Vulnerability · Published Aug 10, 2026 · Assigned by VulnCheck
CVE-2026-71959Bitwarden Server < 2026.7.2 Audit Log Injection via POST /collect
Medium 5.8
In plain English
A medium-severity missing authorization in server from bitwarden. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)5.8Medium
Exploit odds (30 days)0.5%top 58.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
References
- Researcher Blog technical-description, exploit
- Release Notes release-notes
- Pull Request issue-tracking
- Patch Commit patch
- https://www.vulncheck.com/advisories/bitwarden-server-audit-log-injection-via-post-collect third-party-advisory