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Back to active CVEs
High · CVSS 8.6CVE-2026-43640

Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API KeyCVE-2026-43640

Answer in brief

CVE-2026-43640 records a High severity (CVSS 8.6) vulnerability in Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key. The current sources do not mark it as known exploited. The current feed maps bitwarden/server (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 11, 2026Updated Nov 8, 2026Source checked Nov 8, 2026First seen by HOL Oct 28, 2026Material review Nov 8, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.6
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps bitwarden/server (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
bitwarden/servergeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for bitwarden/server.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    May 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 28, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencesanjokkarki.com.np
  • Source referencevulncheck.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-303
Source
CVE List V5
Source checked
Nov 8, 2026
References
5 linked sources
Open source record