CVE-2026-118655

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    CVE-2026-118655

    Published: 28 Oct 2026Last Modified: 5 Nov 2026

    Summary: Echo: Static Middleware Double-Unescape Path Traversal

    Details: Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, middleware.Static can decode an already decoded Request.URL.Path a second time. Double-encoded separators can consequently be reconstructed before filesystem resolution. This can reach a file under a guarded route when the static middleware is registered globally. This issue is fixed in 4.15.3 and 5.2.0.

    References: https://github.com/labstack/echo/releases/tag/v4.15.3, https://github.com/labstack/echo/releases/tag/v5.2.0, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118655.json, https://github.com/labstack/echo/security/advisories/GHSA-xwq5-6cqp-vx96, https://nvd.nist.gov/vuln/detail/CVE-2026-118655, https://github.com/labstack/echo/issues/2599, https://github.com/labstack/echo/commit/a9ede66a5a7196411131beb1ee801e75bbaf7ac6, https://github.com/labstack/echo/commit/c3fa2a27ff92b2b8db360de614f999ef1da24725, https://github.com/labstack/echo/pull/3006

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 9500f2745481e2dff1313e2e6734c488e80c13fb
    Fixed -5786024ea4d85c01784796e8aa7aac53e007b39b

    Affected versions

    v4.15.2
    v4.15.1
    v4.15.0

    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-2026-118655 | CVE-DB