CVE-2026-118263

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    CVE-2026-118263

    Published: 28 Oct 2026Last Modified: 5 Nov 2026

    Summary: Echo: BodyDump can discard BodyLimit overflow errors for unknown-length requests

    Details: Echo is a Go web framework. From 5.0.0 until 5.4.1, Echo v5's BodyDump middleware can discard a BodyLimit overflow error for an unknown-length request when BodyDump's capture limit is below the BodyLimit threshold. BodyDump drains the remaining body while ignoring read errors and replaces it with the captured prefix, so an HTTP/1.1 chunked request can be truncated and processed successfully even though the original body exceeded the configured limit. Known-length requests rejected before BodyDump runs are unaffected, and the issue does not establish a general authentication bypass or denial of service. This issue is fixed in 5.4.1.

    References: https://github.com/labstack/echo/releases/tag/v5.4.1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118263.json, https://github.com/labstack/echo/security/advisories/GHSA-x9ff-22gv-65f4, https://nvd.nist.gov/vuln/detail/CVE-2026-118263, https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaaec, https://github.com/labstack/echo/pull/3105

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 9500f2745481e2dff1313e2e6734c488e80c13fb
    Fixed -a6a9673a54d2c719ceb32ce6a929d35483acfb2b

    Affected versions

    v5.4.0

    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
    CVE-2026-118263 | CVE-DB