CVE Feed

    Dashboard / CVE / CVE-2026-5845

    CVE-2026-5845

    An improper authorization vulnerability in scoped user-to-server (ghu_) token authorization in GitHub Enterprise Server allows an authenticated attacker to access private repositories outside the intended installation scope, which can include write operations, via an authorization fallback that treated a revoked/deleted installation as a global installation context, which could be chained with token revocation timing and SSH push attribution to obtain and reuse a victim-scoped token. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, and 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.

    Published:Apr 21, 2026
    Last Modified:Apr 29, 2026
    EPS:Apr 21, 2026
    EPSS Score:0.00014
    CVSS Score:9.6

    Affected Products

    Vendor
    Github
    Product
    Enterprise Server

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-76851 (CVSS 7.7) — A Server-Side Request Forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed rem…
    CVE-2026-19118 (CVSS 7.7) — A time-of-check time-of-use race condition vulnerability was identified in GitHub Enterprise Server that allow…
    CVE-2026-18730 (CVSS 8.2) — A server-side request forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed an …
    CVE-2026-15996 (CVSS 6.6) — A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated a…
    CVE-2026-17556 (CVSS 8.8) — A path traversal vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated atta…
    CVE-2026-15783 (CVSS 5.3) — A missing authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated…
    CVE-2026-15343 (CVSS 8.6) — A path traversal vulnerability was identified in GitHub Enterprise Server that allowed an attacker who had cod…
    CVE-2026-15007 (CVSS 5.7) — A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an authenticated use…
    CVE-2026-14340 (CVSS 5.3) — An incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed a user-to-ser…
    CVE-2026-10585 (CVSS 6.3) — A stored cross-site scripting vulnerability was identified in GitHub Enterprise Server that allowed an authent…

    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