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    CVE-2026-43640

    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:May 11, 2026
    Last Modified:May 16, 2026
    EPS:May 11, 2026
    EPSS Score:0.00055
    CVSS Score:8.1

    Affected Products

    Vendor
    Bitwarden
    Product
    Server

    Exploits

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

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-90 Reflection Attack in Authentication Protocol

    Related CVEs

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    CVE-2026-57522 (CVSS 2.3) — Bitwarden Server before 2026.5.0 contains a JSON injection vulnerability in IntegrationTemplateProcessor.Repla…
    CVE-2026-57521 (CVSS 5.3) — Bitwarden Server before 2026.5.0 contains a broken access control vulnerability that allows any authenticated …
    CVE-2026-57520 (CVSS 7.1) — Bitwarden Server before 2026.5.0 contains a privilege escalation vulnerability that allows authenticated Custo…
    CVE-2026-43639 (CVSS 8.9) — Bitwarden Server prior to v2026.4.0 contains a missing authorization vulnerability that allows a provider serv…
    CVE-2026-43638 (CVSS 5.3) — Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticat…
    CVE-2020-15879 (CVSS 7.5) — Bitwarden Server 1.35.1 allows SSRF because it does not consider certain IPv6 addresses (ones beginning with f…
    CVE-2019-19766 (CVSS 7.5) — The Bitwarden server through 1.32.0 has a potentially unwanted KDF.…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High