CVE-2026-71959

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.

CVSS 4.0

6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

CVSS 3.1

5.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

EPSS

0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-25)

CWE

CWE-862

Published

2026-08-10

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

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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