Bitwarden Server before 2026.7.2 does not verify that the caller is a member of the organization identified in a POST /collect request body, allowing any authenticated user to write forged, arbitrarily backdated entries into any organization's audit log.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Bitwarden Server
cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*
|
— |
2026.7.2
|
References 5
https://github.com/bitwarden/server/commit/2aa92a3c8675a28e305e8207ff16592227f9…
disclosure@vulncheck.com
https://github.com/bitwarden/server/pull/7934
disclosure@vulncheck.com
https://github.com/bitwarden/server/releases/tag/v2026.7.2
disclosure@vulncheck.com
https://sanjokkarki.com.np/blog/bitwarden-audit-log-forgery
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/bitwarden-server-audit-log-injection-via-p…
disclosure@vulncheck.com