CVE-2026-43640

Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key

Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization's SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only a valid session.

Affected

bitwarden · server

CVSS v4.0 VULNCHECK

8.6 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/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 VULNCHECK

8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS

0.71% chance of exploitation in the next 30 days, 53rd percentile

Published

2026-05-11

Updated

2026-07-14

Proof-of-concept exploits (1)

• https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass

Security advisories

• https://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-…
• bitwarden/server/pull/7403

References

• CVE Record
• NVD entry