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Description

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.

PUBLISHED Reserved 2026-05-01 | Published 2026-05-11 | Updated 2026-05-11 | Assigner VulnCheck




HIGH: 8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

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

Problem types

Incorrect Implementation of Authentication Algorithm

Product status

Default status
affected

Any version before 2026.4.1
affected

Credits

Sanjok Karki finder

References

sanjokkarki.com.np/blog/bitwarden-scim-key-bypass technical-description exploit

github.com/bitwarden/server/releases/tag/v2026.4.1 release-notes

github.com/bitwarden/server/pull/7403 issue-tracking

github.com/...ommit/eb251d9bf80724c87b187661783b9354d1784083 patch

www.vulncheck.com/...-authentication-bypass-via-scim-api-key third-party-advisory

cve.org (CVE-2026-43640)

nvd.nist.gov (CVE-2026-43640)

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