Weakness
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.
References
- https://github.com/bitwarden/server/commit/2aa92a3c8675a28e305e8207ff16592227f96291
- https://github.com/bitwarden/server/pull/7934
- https://github.com/bitwarden/server/releases/tag/v2026.7.2
- https://sanjokkarki.com.np/blog/bitwarden-audit-log-forgery
- https://www.vulncheck.com/advisories/bitwarden-server-audit-log-injection-via-post-collect
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