CVE-2026-71959 Bitwarden Server < 2026.7.2 Audit Log Injection via POST /collect
An authenticated attacker can inject forged audit log entries into any organization's logs due to missing membership verification.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-71959?
CVE-2026-71959 is a medium-severity missing authorization vulnerability in bitwarden server, published on 10 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-71959?
How do I fix CVE-2026-71959?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-71959 being exploited?
There is no known exploitation of CVE-2026-71959 in the wild and no public exploit code.
Sources
Also known as GHSA-m2wp-hqw2-j56m, MINI-3rcv-q6r8-6cf7.