GO-2026-6609

    Dashboard / Vulnerabilities / GO-2026-6609

    GO-2026-6609

    Published: 8 Oct 2026Last Modified: 8 Oct 2026

    Summary: Lack of limit on size of parsed Range headers in net/http

    Details: When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU.

    References: https://go.dev/cl/847309, https://go.dev/issue/81858, https://groups.google.com/g/golang-announce/c/U2fTuyDJznI

    Affected packages

    Package

    Name: stdlib

    Purl: pkg:golang/stdlib

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.26.9

    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