GO-2025-4155

    Dashboard / Vulnerabilities / GO-2025-4155

    GO-2025-4155

    Published: 2 Dec 2025Last Modified: 14 Aug 2026

    Summary: Excessive resource consumption when printing error string for host certificate validation in crypto/x509

    Details: Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption.

    References: https://go.dev/cl/725920, https://go.dev/issue/76445, https://groups.google.com/g/golang-announce/c/8FJoBkPddm4

    Affected packages

    Package

    Name: stdlib

    Purl: pkg:golang/stdlib

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.24.11

    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
    GO-2025-4155 | CVE-DB