CVE-2026-121967

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    CVE-2026-121967

    Published: 4 Nov 2026Last Modified: 5 Nov 2026

    Summary: Coder before 2.29.22, 2.34.13, 2.35.10, 2.36.8, 2.37.5, and 2.38.1 AI Gateway Path Traversal

    Details: Coder 2.28.0 before 2.29.22, 2.30.0 before 2.34.13, 2.35.0 before 2.35.10, 2.36.0 before 2.36.8, 2.37.0 before 2.37.5, and 2.38.0 before 2.38.1 contains a path traversal vulnerability in the AI Gateway passthrough router, which forwards percent-encoded dot segments upstream without rejecting them. Authenticated users can send paths such as %2e%2e or ..%2F under allowlisted prefixes to reach unintended provider endpoints using the deployment's centrally managed provider key.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121967.json, https://github.com/coder/coder/security/advisories/GHSA-373r-678h-hjc6, https://nvd.nist.gov/vuln/detail/CVE-2026-121967, https://www.vulncheck.com/advisories/coder-before-2.29.22-2.34.13-2.35.10-2.36.8-2.37.5-and-2.38.1-ai-gateway-path-traversal, https://github.com/coder/coder/pull/30178

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 8a148a9a57eef8dc19db13d1423adcdaadd319d4
    Fixed -13f2ca9cf0d994e4ee9075400c0ef5d9f838f842

    Affected versions

    v2.35.9
    v2.35.8
    v2.35.7
    v2.35.6
    v2.35.5
    v2.35.4
    v2.35.3
    v2.35.2
    v2.35.1
    v2.35.0

    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
    CVE-2026-121967 | CVE-DB