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 v4.0

6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

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

EPSS

0.29% chance of exploitation in the next 30 days, 21th percentile

Published

2026-08-10

Updated

2026-08-17

Proof-of-concept exploits (1)

• https://sanjokkarki.com.np/blog/bitwarden-audit-log-forgery

References

• CVE Record
• NVD entry

Related

• CVE-2026-7194
• CVE-2026-7196
• CVE-2026-71847
• CVE-2026-71960
• CVE-2026-7179
• CVE-2026-71962