CVE-2026-43640

Summary

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 Software

Weaknesses

• CWE-303: Incorrect Implementation of Authentication Algorithm

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

References

• https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass
• https://github.com/bitwarden/server/releases/tag/v2026.4.1
• https://github.com/bitwarden/server/pull/7403
• https://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083
• https://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-key

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