GHSA-hq85-5cpj-mr62

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    GHSA-hq85-5cpj-mr62

    Published: 20 Oct 2026Last Modified: 20 Oct 2026

    Summary: uv's bundled CA store trusts an emSign root whose intermediate CA keys are compromised

    Details: By default, uv verifies TLS connections against a vendored copy of the `webpki-root-certs` bundle. Versions before 0.13.4 include the `emSign ECC Root CA - G3` root. Eight eMudhra intermediate CA certificates that chain to that root have compromised private keys, and the CA has revoked them. An attacker with one of the compromised keys can issue certificates that uv accepts for any hostname, and can be used to issue certificates to enable MITM attacks. uv 0.13.4 removes the root from its vendored bundle, following `webpki-root-certs` 1.0.10. Upgrade to 0.13.4 or later.

    References: https://github.com/astral-sh/uv/security/advisories/GHSA-hq85-5cpj-mr62, https://github.com/certifi/python-certifi/security/advisories/GHSA-6q48-6c7w-9gw2, https://emudhra.we-have-a-problem.com, https://github.com/astral-sh/uv, https://groups.google.com/a/mozilla.org/g/dev-security-policy/c/0R3XLJL6FuE/m/0XofdebrAAAJ

    Affected packages

    Package

    Name: uv

    Purl: pkg:pypi/uv

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.13.4

    Affected versions

    0.0.5

    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
    GHSA-hq85-5cpj-mr62 | CVE-DB