CVE-2026-71959

EUVD-2026-55631
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
5.8 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
bitwardenbitwarden
𝑥
< 2026.7.2
CNA
Common Weakness Enumeration
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