# CVE-2026-43640: Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key

> CVE-2026-43640: Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key. CVSS 8.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-43640
Last updated: 2026-07-14T21:16:54Z

- Published: 2026-05-11 17:14 UTC · Updated: 2026-07-14 21:16 UTC · Assigner: VulnCheck
- CVSS: 8.1 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS: 0.50%, 43th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-303

## 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.

## Affected vendors and products

- bitwarden: server

## Tracked companies

- [Bitwarden](https://rewindex.com/company/bitwarden.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-43640)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-43640)
- [https://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083](https://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083)
- [https://github.com/bitwarden/server/pull/7403](https://github.com/bitwarden/server/pull/7403)
- [https://github.com/bitwarden/server/releases/tag/v2026.4.1](https://github.com/bitwarden/server/releases/tag/v2026.4.1)
- [https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass](https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass)
- [https://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-key](https://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-key)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-43640 · Markdown: https://rewindex.com/cve/CVE-2026-43640.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-43640 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:04:03.150Z