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Vulnerability Details :

CVE-2026-11800

Summary
Assigner-redhat
Assigner Org ID-53f830b8-0a3f-465b-8143-3b8a9948e749
Published At-25 Jun, 2026 | 20:57
Updated At-25 Jun, 2026 | 20:57
Rejected At-
Credits

Org.keycloak:keycloak-services: keycloak: authentication bypass via jwt algorithm confusion

A flaw was found in Keycloak. This JWT algorithm confusion vulnerability in the JWT Authorization Grant flow allows an attacker with valid client credentials to bypass signature verification. By forging an assertion, the attacker can create unauthorized access tokens. This enables the attacker to impersonate any federated user linked to the affected Identity Provider, leading to unauthorized access and potential privilege escalation.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:redhat
Assigner Org ID:53f830b8-0a3f-465b-8143-3b8a9948e749
Published At:25 Jun, 2026 | 20:57
Updated At:25 Jun, 2026 | 20:57
Rejected At:
â–¼CVE Numbering Authority (CNA)
Org.keycloak:keycloak-services: keycloak: authentication bypass via jwt algorithm confusion

A flaw was found in Keycloak. This JWT algorithm confusion vulnerability in the JWT Authorization Grant flow allows an attacker with valid client credentials to bypass signature verification. By forging an assertion, the attacker can create unauthorized access tokens. This enables the attacker to impersonate any federated user linked to the affected Identity Provider, leading to unauthorized access and potential privilege escalation.

Affected Products
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.6
Collection URL
https://catalog.redhat.com/software/containers/
Package Name
rhbk/keycloak-operator-bundle
CPEs
  • cpe:/a:redhat:build_keycloak:26.6::el9
Default Status
affected
Versions
Unaffected
  • From 26.6.4-2 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.6
Collection URL
https://catalog.redhat.com/software/containers/
Package Name
rhbk/keycloak-rhel9
CPEs
  • cpe:/a:redhat:build_keycloak:26.6::el9
Default Status
affected
Versions
Unaffected
  • From 26.6-8 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.6
Collection URL
https://catalog.redhat.com/software/containers/
Package Name
rhbk/keycloak-rhel9-operator
CPEs
  • cpe:/a:redhat:build_keycloak:26.6::el9
Default Status
affected
Versions
Unaffected
  • From 26.6-8 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.6.4
Collection URL
https://access.redhat.com/downloads/content/package-browser/
CPEs
  • cpe:/a:redhat:build_keycloak:26.6::el9
Default Status
unaffected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Build of Keycloak
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
rhbk/keycloak-rhel9
CPEs
  • cpe:/a:redhat:build_keycloak:
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Build of Keycloak
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
rhbk-openshift-rhel9/rhbk-openshift-rhel9
CPEs
  • cpe:/a:redhat:build_keycloak:
Default Status
unaffected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Data Grid 8
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
keycloak-services
CPEs
  • cpe:/a:redhat:jboss_data_grid:8
Default Status
unaffected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat JBoss Enterprise Application Platform Expansion Pack
Collection URL
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
Package Name
keycloak-services
CPEs
  • cpe:/a:redhat:jbosseapxp
Default Status
unaffected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Single Sign-On 7
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
keycloak-services
CPEs
  • cpe:/a:redhat:red_hat_single_sign_on:7
Default Status
unaffected
Problem Types
TypeCWE IDDescription
CWECWE-347Improper Verification of Cryptographic Signature
Type: CWE
CWE ID: CWE-347
Description: Improper Verification of Cryptographic Signature
Metrics
VersionBase scoreBase severityVector
3.18.1HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Metrics Other Info
Red Hat severity rating
value:
Important
namespace:
https://access.redhat.com/security/updates/classification/
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Red Hat would like to thank Bilal Teke for reporting this issue.
Timeline
EventDate
Reported to Red Hat.2026-06-09 05:06:35
Made public.2026-05-29 00:00:00
Event: Reported to Red Hat.
Date: 2026-06-09 05:06:35
Event: Made public.
Date: 2026-05-29 00:00:00
Replaced By

Rejected Reason

References
HyperlinkResource
https://access.redhat.com/errata/RHSA-2026:30083
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30084
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-11800
vdb-entry
x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2487006
issue-tracking
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/errata/RHSA-2026:30083
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/errata/RHSA-2026:30084
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/security/cve/CVE-2026-11800
Resource:
vdb-entry
x_refsource_REDHAT
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2487006
Resource:
issue-tracking
x_refsource_REDHAT
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:secalert@redhat.com
Published At:25 Jun, 2026 | 22:17
Updated At:25 Jun, 2026 | 22:17

A flaw was found in Keycloak. This JWT algorithm confusion vulnerability in the JWT Authorization Grant flow allows an attacker with valid client credentials to bypass signature verification. By forging an assertion, the attacker can create unauthorized access tokens. This enables the attacker to impersonate any federated user linked to the affected Identity Provider, leading to unauthorized access and potential privilege escalation.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.18.1HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Type: Primary
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-347Primarysecalert@redhat.com
CWE ID: CWE-347
Type: Primary
Source: secalert@redhat.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://access.redhat.com/errata/RHSA-2026:30083secalert@redhat.com
N/A
https://access.redhat.com/errata/RHSA-2026:30084secalert@redhat.com
N/A
https://access.redhat.com/security/cve/CVE-2026-11800secalert@redhat.com
N/A
https://bugzilla.redhat.com/show_bug.cgi?id=2487006secalert@redhat.com
N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:30083
Source: secalert@redhat.com
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:30084
Source: secalert@redhat.com
Resource: N/A
Hyperlink: https://access.redhat.com/security/cve/CVE-2026-11800
Source: secalert@redhat.com
Resource: N/A
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2487006
Source: secalert@redhat.com
Resource: N/A

Change History

0
Information is not available yet

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Matching Score-8
Assigner-Red Hat, Inc.
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Matching Score-8
Assigner-Red Hat, Inc.
CVSS Score-8.1||HIGH
EPSS-1.05% / 60.02%
||
7 Day CHG~0.00%
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Matching Score-8
Assigner-Red Hat, Inc.
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Matching Score-8
Assigner-Red Hat, Inc.
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||
7 Day CHG+0.11%
Published-12 Jun, 2024 | 08:18
Updated-20 Nov, 2025 | 07:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Freeipa: user can obtain a hash of the passwords of all domain users and perform offline brute force

A vulnerability was found in FreeIPA in a way when a Kerberos TGS-REQ is encrypted using the client’s session key. This key is different for each new session, which protects it from brute force attacks. However, the ticket it contains is encrypted using the target principal key directly. For user principals, this key is a hash of a public per-principal randomly-generated salt and the user’s password. If a principal is compromised it means the attacker would be able to retrieve tickets encrypted to any principal, all of them being encrypted by their own key directly. By taking these tickets and salts offline, the attacker could run brute force attacks to find character strings able to decrypt tickets when combined to a principal salt (i.e. find the principal’s password).

Action-Not Available
Vendor-Red Hat, Inc.
Product-enterprise_linuxenterprise_linux_ausenterprise_linux_eusenterprise_linux_update_services_for_sap_solutionsenterprise_linux_tusRed Hat Enterprise Linux 8.8 Extended Update SupportRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat Enterprise Linux 10Red Hat Enterprise Linux 9Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat Enterprise Linux 8.4 Telecommunications Update ServiceRed Hat Enterprise Linux 9.0 Extended Update SupportRed Hat Enterprise Linux 7Red Hat Enterprise Linux 8.2 Advanced Update SupportRed Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRed Hat Enterprise Linux 8.6 Telecommunications Update ServiceRed Hat Enterprise Linux 9.2 Extended Update SupportRed Hat Enterprise Linux 8
CWE ID-CWE-916
Use of Password Hash With Insufficient Computational Effort
CVE-2026-9793
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-5.9||MEDIUM
EPSS-0.12% / 2.11%
||
7 Day CHG~0.00%
Published-28 May, 2026 | 03:44
Updated-03 Jun, 2026 | 18:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Keycloak: keycloak: security policy bypass in jwe-encrypted request object processing

A flaw was found in Keycloak. When a JSON Web Encryption (JWE) encrypted request object is submitted, Keycloak may incorrectly process unsigned claims if the decrypted content is raw JSON, bypassing the configured signature policy. This allows a remote attacker to submit unauthorized claims, leading to a compromise of data integrity within the OpenID Connect (OIDC) authorization flow. While a redirect URI allowlist acts as a compensating control, this vulnerability violates OIDC Core and Financial-grade API (FAPI) signing requirements.

Action-Not Available
Vendor-Red Hat, Inc.
Product-build_of_keycloakRed Hat Build of Keycloak
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2024-49393
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-6.5||MEDIUM
EPSS-0.26% / 17.43%
||
7 Day CHG~0.00%
Published-12 Nov, 2024 | 01:55
Updated-26 Jun, 2026 | 02:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Mutt: neomutt: to and cc email header fields are not protected by cryptographic signing

In neomutt and mutt, the To and Cc email headers are not validated by cryptographic signing which allows an attacker that intercepts a message to change their value and include himself as a one of the recipients to compromise message confidentiality.

Action-Not Available
Vendor-muttneomuttRed Hat, Inc.
Product-neomuttmuttenterprise_linuxRed Hat Enterprise Linux 8Red Hat Enterprise Linux 9Red Hat Enterprise Linux 10Red Hat Enterprise Linux 7
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2024-49394
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-5.3||MEDIUM
EPSS-0.26% / 16.68%
||
7 Day CHG~0.00%
Published-12 Nov, 2024 | 02:07
Updated-26 Jun, 2026 | 02:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Mutt: neomutt: in-reply-to email header field it not protected by cryptograpic signing

In mutt and neomutt the In-Reply-To email header field is not protected by cryptographic signing which allows an attacker to reuse an unencrypted but signed email message to impersonate the original sender.

Action-Not Available
Vendor-muttneomuttRed Hat, Inc.
Product-neomuttmuttenterprise_linuxRed Hat Enterprise Linux 7Red Hat Enterprise Linux 9Red Hat Enterprise Linux 8
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2019-14859
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-7.4||HIGH
EPSS-1.60% / 72.66%
||
7 Day CHG~0.00%
Published-02 Jan, 2020 | 14:15
Updated-05 Aug, 2024 | 00:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A flaw was found in all python-ecdsa versions before 0.13.3, where it did not correctly verify whether signatures used DER encoding. Without this verification, a malformed signature could be accepted, making the signature malleable. Without proper verification, an attacker could use a malleable signature to create false transactions.

Action-Not Available
Vendor-python-ecdsa_projectRed Hat, Inc.
Product-python-ecdsavirtualizationopenstackceph_storagepython-ecdsa
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2026-2625
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-4||MEDIUM
EPSS-0.08% / 0.40%
||
7 Day CHG~0.00%
Published-03 Apr, 2026 | 18:38
Updated-01 May, 2026 | 21:13
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Rust-rpm-sequoia: rust-rpm-sequoia: denial of service via crafted rpm file during signature verification

A flaw was found in rust-rpm-sequoia. An attacker can exploit this vulnerability by providing a specially crafted Red Hat Package Manager (RPM) file. During the RPM signature verification process, this crafted file can trigger an error in the OpenPGP signature parsing code, leading to an unconditional termination of the rpm process. This issue results in an application level denial of service, making the system unable to process RPM files for signature verification.

Action-Not Available
Vendor-sequoia-pgpRed Hat, Inc.
Product-rpm-sequoiahardened_imagesenterprise_linuxRed Hat Hardened ImagesRed Hat Enterprise Linux 10Red Hat Enterprise Linux 9
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2014-3585
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-9.8||CRITICAL
EPSS-1.06% / 60.36%
||
7 Day CHG~0.00%
Published-22 Nov, 2019 | 14:51
Updated-06 Aug, 2024 | 10:50
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

redhat-upgrade-tool: Does not check GPG signatures when upgrading versions

Action-Not Available
Vendor-Red Hat, Inc.
Product-enterprise_linuxredhat-upgrade-toolredhat-upgrade-tool
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2024-0567
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-7.5||HIGH
EPSS-1.41% / 69.21%
||
7 Day CHG~0.00%
Published-16 Jan, 2024 | 14:01
Updated-20 Nov, 2025 | 18:09
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Gnutls: rejects certificate chain with distributed trust

A vulnerability was found in GnuTLS, where a cockpit (which uses gnuTLS) rejects a certificate chain with distributed trust. This issue occurs when validating a certificate chain with cockpit-certificate-ensure. This flaw allows an unauthenticated, remote client or attacker to initiate a denial of service attack.

Action-Not Available
Vendor-Debian GNU/LinuxRed Hat, Inc.GNUFedora ProjectNetApp, Inc.
Product-gnutlsdebian_linuxactive_iq_unified_managerfedoraRed Hat Enterprise Linux 9RHOL-5.8-RHEL-9RHODF-4.15-RHEL-9Red Hat Enterprise Linux 7Red Hat OpenShift Container Platform 3.11Red Hat Enterprise Linux 6Red Hat Enterprise Linux 9.2 Extended Update SupportRed Hat Enterprise Linux 8
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2025-12150
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-3.1||LOW
EPSS-0.20% / 10.15%
||
7 Day CHG~0.00%
Published-27 Feb, 2026 | 08:10
Updated-06 Mar, 2026 | 18:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Org.keycloak/keycloak-services: webauthn attestation statement verification bypass

A flaw was found in Keycloak’s WebAuthn registration component. This vulnerability allows an attacker to bypass the configured attestation policy and register untrusted or forged authenticators via submission of an attestation object with fmt: "none", even when the realm is configured to require direct attestation. This can lead to weakened authentication integrity and unauthorized authenticator registration.

Action-Not Available
Vendor-KeycloakRed Hat, Inc.
Product-keycloakbuild_of_keycloakRed Hat build of Keycloak 26.4.4Red Hat build of Keycloak 26.4Red Hat build of Keycloak 26.2keycloakRed Hat build of Keycloak 26.2.11
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2024-8698
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-7.7||HIGH
EPSS-2.04% / 78.72%
||
7 Day CHG~0.00%
Published-19 Sep, 2024 | 15:48
Updated-15 Apr, 2026 | 00:35
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Keycloak-saml-core: improper verification of saml responses leading to privilege escalation in keycloak

A flaw exists in the SAML signature validation method within the Keycloak XMLSignatureUtil class. The method incorrectly determines whether a SAML signature is for the full document or only for specific assertions based on the position of the signature in the XML document, rather than the Reference element used to specify the signed element. This flaw allows attackers to create crafted responses that can bypass the validation, potentially leading to privilege escalation or impersonation attacks.

Action-Not Available
Vendor-Red Hat, Inc.
Product-Red Hat Single Sign-On 7.6 for RHEL 8Red Hat Single Sign-On 7.6 for RHEL 7Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9RHEL-8 based Middleware ContainersRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 8Red Hat Single Sign-On 7Red Hat Single Sign-On 7.6 for RHEL 9Red Hat JBoss Enterprise Application Platform 8Red Hat Build of KeycloakRed Hat build of Keycloak 24Red Hat build of Keycloak 22
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2023-3347
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-5.9||MEDIUM
EPSS-0.39% / 30.81%
||
7 Day CHG~0.00%
Published-20 Jul, 2023 | 14:54
Updated-20 Nov, 2025 | 17:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Samba: smb2 packet signing is not enforced when "server signing = required" is set

A vulnerability was found in Samba's SMB2 packet signing mechanism. The SMB2 packet signing is not enforced if an admin configured "server signing = required" or for SMB2 connections to Domain Controllers where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and server, affecting the integrity of the data.

Action-Not Available
Vendor-Red Hat, Inc.Fedora ProjectSamba
Product-storageenterprise_linuxfedorasambaRed Hat Enterprise Linux 9Red Hat Storage 3Red Hat Enterprise Linux 7Red Hat Enterprise Linux 6Red Hat Enterprise Linux 8
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CWE ID-CWE-924
Improper Enforcement of Message Integrity During Transmission in a Communication Channel
CVE-2024-2307
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-6.1||MEDIUM
EPSS-0.19% / 8.55%
||
7 Day CHG~0.00%
Published-19 Mar, 2024 | 16:16
Updated-15 Apr, 2026 | 00:35
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Osbuild-composer: race condition may disable gpg verification for package repositories

A flaw was found in osbuild-composer. A condition can be triggered that disables GPG verification for package repositories, which can expose the build phase to a Man-in-the-Middle attack, allowing untrusted code to be installed into an image being built.

Action-Not Available
Vendor-Red Hat, Inc.
Product-Red Hat Enterprise Linux 9Red Hat Enterprise Linux 8
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2019-10201
Matching Score-4
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-4
Assigner-Red Hat, Inc.
CVSS Score-8.1||HIGH
EPSS-0.71% / 48.95%
||
7 Day CHG~0.00%
Published-14 Aug, 2019 | 16:09
Updated-04 Aug, 2024 | 22:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

It was found that Keycloak's SAML broker, versions up to 6.0.1, did not verify missing message signatures. If an attacker modifies the SAML Response and removes the <Signature> sections, the message is still accepted, and the message can be modified. An attacker could use this flaw to impersonate other users and gain access to sensitive information.

Action-Not Available
Vendor-Red Hat, Inc.
Product-single_sign-onkeycloakkeycloak
CWE ID-CWE-592
DEPRECATED: Authentication Bypass Issues
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2026-40070
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-8.1||HIGH
EPSS-0.14% / 3.33%
||
7 Day CHG~0.00%
Published-09 Apr, 2026 | 17:26
Updated-24 Apr, 2026 | 17:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
bsv-sdk and bsv-wallet persist unverified certifier signatures in acquire_certificate (direct and issuance paths)

BSV Ruby SDK is the Ruby SDK for the BSV blockchain. From 0.3.1 to before 0.8.2, BSV::Wallet::WalletClient#acquire_certificate persists certificate records to storage without verifying the certifier's signature over the certificate contents. In acquisition_protocol: 'direct', the caller supplies all certificate fields (including signature:) and the record is written to storage verbatim. In acquisition_protocol: 'issuance', the client POSTs to a certifier URL and writes whatever signature the response body contains, also without verification. An attacker who can reach either API (or who controls a certifier endpoint targeted by the issuance path) can forge identity certificates that subsequently appear authentic to list_certificates and prove_certificate.

Action-Not Available
Vendor-sgbettsgbett
Product-bsv-walletbsv_ruby_sdkbsv-ruby-sdkbsv-sdkbsv-wallet
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2026-34840
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-8.1||HIGH
EPSS-0.26% / 17.71%
||
7 Day CHG~0.00%
Published-02 Apr, 2026 | 18:52
Updated-13 Apr, 2026 | 18:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
OneUptime SSO: Multi-Assertion Identity Injection via Decoupled Signature Verification

OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, OneUptime's SAML SSO implementation (App/FeatureSet/Identity/Utils/SSO.ts) has decoupled signature verification and identity extraction. isSignatureValid() verifies the first <Signature> element in the XML DOM using xml-crypto, while getEmail() always reads from assertion[0] via xml2js. An attacker can prepend an unsigned assertion containing an arbitrary identity before a legitimately signed assertion, resulting in authentication bypass. This issue has been patched in version 10.0.42.

Action-Not Available
Vendor-hackerbayOneUptime
Product-oneuptimeoneuptime
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
CVE-2025-23206
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-1.8||LOW
EPSS-0.31% / 22.88%
||
7 Day CHG-0.00%
Published-17 Jan, 2025 | 20:34
Updated-23 Jan, 2026 | 15:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
IAM OIDC custom resource allows connection to unauthorized OIDC provider in aws-cdk

The AWS Cloud Development Kit (AWS CDK) is an open-source software development framework to define cloud infrastructure in code and provision it through AWS CloudFormation. Users who use IAM OIDC custom resource provider package will download CA Thumbprints as part of the custom resource workflow. However, the current `tls.connect` method will always set `rejectUnauthorized: false` which is a potential security concern. CDK should follow the best practice and set `rejectUnauthorized: true`. However, this could be a breaking change for existing CDK applications and we should fix this with a feature flag. Note that this is marked as low severity Security advisory because the issuer url is provided by CDK users who define the CDK application. If they insist on connecting to a unauthorized OIDC provider, CDK should not disallow this. Additionally, the code block is run in a Lambda environment which mitigate the MITM attack. The patch is in progress. To mitigate, upgrade to CDK v2.177.0 (Expected release date 2025-02-22). Once upgraded, users should make sure the feature flag '@aws-cdk/aws-iam:oidcRejectUnauthorizedConnections' is set to true in `cdk.context.json` or `cdk.json`. There are no known workarounds for this vulnerability.

Action-Not Available
Vendor-amazonaws
Product-aws_cloud_development_kitaws-cdk
CWE ID-CWE-347
Improper Verification of Cryptographic Signature
Details not found