GO-2026-4599

    Dashboard / Vulnerabilities / GO-2026-4599

    GO-2026-4599

    Published: 6 Mar 2026Last Modified: 31 Aug 2026

    Summary: Incorrect enforcement of email constraints in crypto/x509

    Details: When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.

    References: https://go.dev/cl/752182, https://go.dev/issue/77952, https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk

    Affected packages

    Package

    Name: stdlib

    Purl: pkg:golang/stdlib

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 1.26.0-0
    Fixed -1.26.1

    Affected versions

    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