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-2026-43639

Summary
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
Published At-11 May, 2026 | 17:14
Updated At-11 May, 2026 | 19:14
Rejected At-
Credits

Bitwarden Server < 2026.4.0 Missing Authorization via Provider Clients

Bitwarden Server prior to v2026.4.0 contains a missing authorization vulnerability that allows a provider service user to add an arbitrary organization to their provider via `POST /providers/{providerId}/clients/existing`, resulting in takeover of the target organization; self-hosted installations are unaffected as this endpoint is restricted to Cloud via SelfHosted(NotSelfHostedOnly = true).

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–ĽCommon Vulnerabilities and Exposures (CVE)
cve.org
Assigner:VulnCheck
Assigner Org ID:83251b91-4cc7-4094-a5c7-464a1b83ea10
Published At:11 May, 2026 | 17:14
Updated At:11 May, 2026 | 19:14
Rejected At:
â–ĽCVE Numbering Authority (CNA)
Bitwarden Server < 2026.4.0 Missing Authorization via Provider Clients

Bitwarden Server prior to v2026.4.0 contains a missing authorization vulnerability that allows a provider service user to add an arbitrary organization to their provider via `POST /providers/{providerId}/clients/existing`, resulting in takeover of the target organization; self-hosted installations are unaffected as this endpoint is restricted to Cloud via SelfHosted(NotSelfHostedOnly = true).

Affected Products
Vendor
bitwarden
Product
server
Repo
https://github.com/bitwarden/server
Default Status
affected
Versions
Affected
  • From 0 before 2026.4.0 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-862Missing Authorization
Type: CWE
CWE ID: CWE-862
Description: Missing Authorization
Metrics
VersionBase scoreBase severityVector
4.08.9HIGH
CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
3.18.0HIGH
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Version: 4.0
Base score: 8.9
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Version: 3.1
Base score: 8.0
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Sanjok Karki
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://sanjokkarki.com.np/blog/bitwarden-provider-takeover
technical-description
exploit
https://github.com/bitwarden/server/releases/tag/v2026.4.0
release-notes
https://github.com/bitwarden/server/pull/7372
issue-tracking
https://github.com/bitwarden/server/commit/0918bfdda6f5eec391c69bd9074f6aef4eac0b1d
patch
https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-provider-clients
third-party-advisory
Hyperlink: https://sanjokkarki.com.np/blog/bitwarden-provider-takeover
Resource:
technical-description
exploit
Hyperlink: https://github.com/bitwarden/server/releases/tag/v2026.4.0
Resource:
release-notes
Hyperlink: https://github.com/bitwarden/server/pull/7372
Resource:
issue-tracking
Hyperlink: https://github.com/bitwarden/server/commit/0918bfdda6f5eec391c69bd9074f6aef4eac0b1d
Resource:
patch
Hyperlink: https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-provider-clients
Resource:
third-party-advisory
â–ĽAuthorized 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–ĽNational Vulnerability Database (NVD)
nvd.nist.gov
Source:disclosure@vulncheck.com
Published At:11 May, 2026 | 18:16
Updated At:16 May, 2026 | 03:04

Bitwarden Server prior to v2026.4.0 contains a missing authorization vulnerability that allows a provider service user to add an arbitrary organization to their provider via `POST /providers/{providerId}/clients/existing`, resulting in takeover of the target organization; self-hosted installations are unaffected as this endpoint is restricted to Cloud via SelfHosted(NotSelfHostedOnly = true).

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
Secondary4.08.9HIGH
CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Secondary3.18.0HIGH
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Primary3.19.1CRITICAL
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Type: Secondary
Version: 4.0
Base score: 8.9
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Secondary
Version: 3.1
Base score: 8.0
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Type: Primary
Version: 3.1
Base score: 9.1
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CPE Matches
bitwarden
bitwarden
>>server>>Versions before 2026.4.0(exclusive)
cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-862Primarydisclosure@vulncheck.com
CWE ID: CWE-862
Type: Primary
Source: disclosure@vulncheck.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/bitwarden/server/commit/0918bfdda6f5eec391c69bd9074f6aef4eac0b1ddisclosure@vulncheck.com
Patch
https://github.com/bitwarden/server/pull/7372disclosure@vulncheck.com
Issue Tracking
Patch
https://github.com/bitwarden/server/releases/tag/v2026.4.0disclosure@vulncheck.com
Release Notes
https://sanjokkarki.com.np/blog/bitwarden-provider-takeoverdisclosure@vulncheck.com
Exploit
Third Party Advisory
https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-provider-clientsdisclosure@vulncheck.com
Third Party Advisory
Hyperlink: https://github.com/bitwarden/server/commit/0918bfdda6f5eec391c69bd9074f6aef4eac0b1d
Source: disclosure@vulncheck.com
Resource:
Patch
Hyperlink: https://github.com/bitwarden/server/pull/7372
Source: disclosure@vulncheck.com
Resource:
Issue Tracking
Patch
Hyperlink: https://github.com/bitwarden/server/releases/tag/v2026.4.0
Source: disclosure@vulncheck.com
Resource:
Release Notes
Hyperlink: https://sanjokkarki.com.np/blog/bitwarden-provider-takeover
Source: disclosure@vulncheck.com
Resource:
Exploit
Third Party Advisory
Hyperlink: https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-provider-clients
Source: disclosure@vulncheck.com
Resource:
Third Party Advisory

Change History

0
Information is not available yet

Similar CVEs

5Records found
CVE-2026-43638
Matching Score-6
Assigner-VulnCheck
ShareView Details
Matching Score-6
Assigner-VulnCheck
CVSS Score-5.3||MEDIUM
EPSS-0.03% / 8.24%
||
7 Day CHG~0.00%
Published-11 May, 2026 | 17:13
Updated-16 May, 2026 | 02:55
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import

Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.

Action-Not Available
Vendor-bitwardenbitwarden
Product-serverserver
CWE ID-CWE-862
Missing Authorization
CVE-2026-26268
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-8.1||HIGH
EPSS-0.05% / 15.11%
||
7 Day CHG~0.00%
Published-13 Feb, 2026 | 16:54
Updated-18 Feb, 2026 | 17:59
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Cursor sandbox escape via Git hooks

Cursor is a code editor built for programming with AI. Sandbox escape via writing .git configuration was possible in versions prior to 2.5. A malicious agent (ie prompt injection) could write to improperly protected .git settings, including git hooks, which may cause out-of-sandbox RCE next time they are triggered. No user interaction was required as Git executes these commands automatically. Fixed in version 2.5.

Action-Not Available
Vendor-anyspherecursor
Product-cursorcursor
CWE ID-CWE-862
Missing Authorization
CVE-2024-55879
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-9.1||CRITICAL
EPSS-20.02% / 95.54%
||
7 Day CHG~0.00%
Published-12 Dec, 2024 | 19:17
Updated-30 Apr, 2025 | 16:01
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
XWiki allows RCE from script right in configurable sections

XWiki Platform is a generic wiki platform. Starting in version 2.3 and prior to versions 15.10.9, 16.3.0, any user with script rights can perform arbitrary remote code execution by adding instances of `XWiki.ConfigurableClass` to any page. This compromises the confidentiality, integrity and availability of the whole XWiki installation. This has been patched in XWiki 15.10.9 and 16.3.0. No known workarounds are available except upgrading.

Action-Not Available
Vendor-XWiki SAS
Product-xwikixwiki-platform
CWE ID-CWE-862
Missing Authorization
CVE-2025-11158
Matching Score-4
Assigner-Hitachi Vantara
ShareView Details
Matching Score-4
Assigner-Hitachi Vantara
CVSS Score-9.1||CRITICAL
EPSS-0.02% / 5.04%
||
7 Day CHG~0.00%
Published-09 Mar, 2026 | 22:12
Updated-06 May, 2026 | 17:50
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Hitachi Vantara Pentaho Data Integration & Analytics - Missing Authorization

Hitachi Vantara Pentaho Data Integration & Analytics versions before 10.2.0.6, including 9.3.x and 8.3.x, do not restrict Groovy scripts in new PRPT reports published by users, allowing insertion of arbitrary scripts and leading to a RCE.

Action-Not Available
Vendor-Hitachi, Ltd.Hitachi Vantara LLC
Product-vantara_pentaho_data_integration_and_analyticsPentaho Data Integration and Analytics
CWE ID-CWE-862
Missing Authorization
CVE-2023-39312
Matching Score-4
Assigner-Patchstack
ShareView Details
Matching Score-4
Assigner-Patchstack
CVSS Score-9.1||CRITICAL
EPSS-0.44% / 63.32%
||
7 Day CHG~0.00%
Published-19 Jun, 2024 | 14:23
Updated-28 Apr, 2026 | 16:08
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
WordPress Avada theme <= 7.11.1 - Auth. Unrestricted Zip Extraction vulnerability

Missing Authorization vulnerability in ThemeFusion Avada.This issue affects Avada: from n/a through 7.11.1.

Action-Not Available
Vendor-Avada (ThemeFusion)
Product-avadaAvadaavada
CWE ID-CWE-862
Missing Authorization
Details not found