GO-2026-4440

    Dashboard / Vulnerabilities / GO-2026-4440

    GO-2026-4440

    Published: 5 Feb 2026Last Modified: 15 May 2026

    Summary: Quadratic parsing complexity in golang.org/x/net/html

    Details: The html.Parse function in golang.org/x/net/html has quadratic parsing complexity when processing certain inputs, which can lead to denial of service (DoS) if an attacker provides specially crafted HTML content.

    References: https://go.dev/cl/709876, https://github.com/golang/vulndb/issues/4440, https://groups.google.com/g/golang-announce/c/jnQcOYpiR2c

    Affected packages

    Package

    Name: golang.org/x/net

    Purl: pkg:golang/golang.org/x/net

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -0.45.0

    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