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2 vulnerabilities found for bitwarden server by bitwarden
CVE-2026-101878 (GCVE-0-2026-101878)
Vulnerability from nvd – Published: 2026-09-29 01:58 – Updated: 2026-09-29 17:22 X_Open Source
VLAI
EPSS
VEX
Title
Bitwarden Server 2025.6.0 < 2025.6.0 Authentication Bypass via SSO Identifier Truncation
Summary
Bitwarden Server 2025.6.0 before 2026.5.0 declares the @ExternalId parameter of the User_ReadBySsoUserOrganizationIdExternalId stored procedure as NVARCHAR(50) while the column it queries stores NVARCHAR(300), silently truncating the SSO login identifier on SQL Server deployments and allowing a user whose identity-provider identifier begins with another organization member's full 50-character identifier to authenticate as that member and obtain a victim-scoped access token.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 17:21 UTC
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://sanjokkarki.com.np/blog/bitwarden-sso-ext… | technical-descriptionexploit |
| https://github.com/bitwarden/server/releases/tag/… | release-notes |
| https://github.com/bitwarden/server/pull/7501 | issue-tracking |
| https://github.com/bitwarden/server/commit/27ae3d… | patch |
| https://www.vulncheck.com/advisories/bitwarden-se… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| bitwarden | bitwarden server |
Affected:
2025.6.0 , < 2026.5.0
(custom)
|
Date Public
2026-04-29 00:00
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CVE-2026-101878 (GCVE-0-2026-101878)
Vulnerability from cvelistv5 – Published: 2026-09-29 01:58 – Updated: 2026-09-29 17:22 X_Open Source
VLAI
EPSS
VEX
Title
Bitwarden Server 2025.6.0 < 2025.6.0 Authentication Bypass via SSO Identifier Truncation
Summary
Bitwarden Server 2025.6.0 before 2026.5.0 declares the @ExternalId parameter of the User_ReadBySsoUserOrganizationIdExternalId stored procedure as NVARCHAR(50) while the column it queries stores NVARCHAR(300), silently truncating the SSO login identifier on SQL Server deployments and allowing a user whose identity-provider identifier begins with another organization member's full 50-character identifier to authenticate as that member and obtain a victim-scoped access token.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 17:21 UTC
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://sanjokkarki.com.np/blog/bitwarden-sso-ext… | technical-descriptionexploit |
| https://github.com/bitwarden/server/releases/tag/… | release-notes |
| https://github.com/bitwarden/server/pull/7501 | issue-tracking |
| https://github.com/bitwarden/server/commit/27ae3d… | patch |
| https://www.vulncheck.com/advisories/bitwarden-se… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| bitwarden | bitwarden server |
Affected:
2025.6.0 , < 2026.5.0
(custom)
|
Date Public
2026-04-29 00:00
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