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  5. CVE-2026-118655

CVE-2026-118655: Echo has a Static Middleware Double-Unescape Path Traversal

October 28, 2026

Commit a9ede66a (PR #3006, issue #2599) silently fixed a path traversal vulnerability in the Echo web framework’s static file middleware.

References

  • github.com/advisories/GHSA-xwq5-6cqp-vx96
  • github.com/labstack/echo/commit/a9ede66a5a7196411131beb1ee801e75bbaf7ac6
  • github.com/labstack/echo/commit/c3fa2a27ff92b2b8db360de614f999ef1da24725
  • github.com/labstack/echo/issues/2599
  • github.com/labstack/echo/pull/3006
  • github.com/labstack/echo/releases/tag/v4.15.3
  • github.com/labstack/echo/releases/tag/v5.2.0
  • github.com/labstack/echo/security/advisories/GHSA-xwq5-6cqp-vx96
  • nvd.nist.gov/vuln/detail/CVE-2026-118655

Code Behaviors & Features

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Affected versions

All versions before 4.15.3

Fixed versions

  • 4.15.3

Solution

Upgrade to version 4.15.3 or above.

Impact 5.9 MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Learn more about CVSS

Weakness

  • CWE-174: Double Decoding of the Same Data

Source file

go/github.com/labstack/echo/v4/CVE-2026-118655.yml

Spotted a mistake? Edit the file on GitLab.

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