Logo
-

Byte Open Security

(ByteOS Network)

Log In

Sign Up

ByteOS

Security
Vulnerability Details
Registries
Custom Views
Weaknesses
Attack Patterns
Filters & Tools
Vulnerability Details :

CVE-2026-34840

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-02 Apr, 2026 | 18:52
Updated At-02 Apr, 2026 | 20:20
Rejected At-
Credits

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.

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:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:02 Apr, 2026 | 18:52
Updated At:02 Apr, 2026 | 20:20
Rejected At:
â–¼CVE Numbering Authority (CNA)
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.

Affected Products
Vendor
OneUptime
Product
oneuptime
Versions
Affected
  • < 10.0.42
Problem Types
TypeCWE IDDescription
CWECWE-347CWE-347: Improper Verification of Cryptographic Signature
Type: CWE
CWE ID: CWE-347
Description: CWE-347: 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
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/OneUptime/oneuptime/security/advisories/GHSA-5w5c-766x-265g
x_refsource_CONFIRM
https://github.com/OneUptime/oneuptime/commit/2fd7ede52f60444710628d6c1b34dee2ef9e57d1
x_refsource_MISC
https://github.com/OneUptime/oneuptime/releases/tag/10.0.42
x_refsource_MISC
Hyperlink: https://github.com/OneUptime/oneuptime/security/advisories/GHSA-5w5c-766x-265g
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/OneUptime/oneuptime/commit/2fd7ede52f60444710628d6c1b34dee2ef9e57d1
Resource:
x_refsource_MISC
Hyperlink: https://github.com/OneUptime/oneuptime/releases/tag/10.0.42
Resource:
x_refsource_MISC
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:02 Apr, 2026 | 20:16
Updated At:13 Apr, 2026 | 18:46

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.

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
Secondary3.18.1HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Type: Secondary
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

hackerbay
hackerbay
>>oneuptime>>Versions before 10.0.42(exclusive)
cpe:2.3:a:hackerbay:oneuptime:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-347Primarysecurity-advisories@github.com
CWE ID: CWE-347
Type: Primary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/OneUptime/oneuptime/commit/2fd7ede52f60444710628d6c1b34dee2ef9e57d1security-advisories@github.com
Patch
https://github.com/OneUptime/oneuptime/releases/tag/10.0.42security-advisories@github.com
Product
Release Notes
https://github.com/OneUptime/oneuptime/security/advisories/GHSA-5w5c-766x-265gsecurity-advisories@github.com
Exploit
Mitigation
Vendor Advisory
Hyperlink: https://github.com/OneUptime/oneuptime/commit/2fd7ede52f60444710628d6c1b34dee2ef9e57d1
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/OneUptime/oneuptime/releases/tag/10.0.42
Source: security-advisories@github.com
Resource:
Product
Release Notes
Hyperlink: https://github.com/OneUptime/oneuptime/security/advisories/GHSA-5w5c-766x-265g
Source: security-advisories@github.com
Resource:
Exploit
Mitigation
Vendor Advisory

Change History

0
Information is not available yet

Similar CVEs

5Records found

CVE-2026-33142
Matching Score-8
Assigner-GitHub, Inc.
ShareView Details
Matching Score-8
Assigner-GitHub, Inc.
CVSS Score-8.1||HIGH
EPSS-0.01% / 1.91%
||
7 Day CHG~0.00%
Published-20 Mar, 2026 | 20:05
Updated-25 Mar, 2026 | 13:42
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
OneUptime: ClickHouse SQL Injection via unvalidated column identifiers in sort, select, and groupBy parameters

OneUptime is a solution for monitoring and managing online services. Prior to version 10.0.34, the fix for CVE-2026-32306 (ClickHouse SQL injection via aggregate query parameters) added column name validation to the _aggregateBy method but did not apply the same validation to three other query construction paths in StatementGenerator. The toSortStatement, toSelectStatement, and toGroupByStatement methods accept user-controlled object keys from API request bodies and interpolate them as ClickHouse Identifier parameters without verifying they correspond to actual model columns. ClickHouse Identifier parameters are substituted directly into queries without escaping, so an attacker who can reach any analytics list or aggregate endpoint can inject arbitrary SQL through crafted sort, select, or groupBy keys. This issue has been patched in version 10.0.34.

Action-Not Available
Vendor-hackerbayOneUptime
Product-oneuptimeoneuptime
CWE ID-CWE-89
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE-2025-23206
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-1.8||LOW
EPSS-0.07% / 20.81%
||
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
CVE-2026-1529
Matching Score-4
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-4
Assigner-Red Hat, Inc.
CVSS Score-8.1||HIGH
EPSS-0.01% / 1.92%
||
7 Day CHG~0.00%
Published-09 Feb, 2026 | 18:36
Updated-16 Feb, 2026 | 21:45
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Org.keycloak.services.resources.organizations: keycloak: unauthorized organization registration via improper invitation token validation

A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token's JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access.

Action-Not Available
Vendor-Red Hat, Inc.
Product-Red Hat build of Keycloak 26.2Red Hat build of Keycloak 26.2.13Red Hat build of Keycloak 26.4Red Hat build of Keycloak 26.4.9
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-0.14% / 33.04%
||
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-0.01% / 1.50%
||
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
Details not found