CVE-2026-25766: Echo has a Windows path traversal via backslash in middleware.Static default filesystem

CVE-2026-25766 · Severity: low · CVSS 3.1 · Published 2026-02-26

Echo has a Windows path traversal via backslash in middleware.Static default filesystem in github.com/labstack/echo/v5

Technologies: github.com/labstack/echo/v5 (Go). Vendors: Go.

Quick answers

Is CVE-2026-25766 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-25766 being exploited in the wild.
How severe is CVE-2026-25766?
Low severity, with a CVSS score of 3.1, published 26 February 2026.
Which products and versions are affected?
github.com/labstack/echo/v5 (Go) SEMVER:introduced=5.0.0,fixed=5.0.3.
Is there a fix for CVE-2026-25766?
Yes. github.com/labstack/echo/v5 (Go): upgrade to 5.0.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-25766?
Check whether you run github.com/labstack/echo/v5 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/labstack/echo/v5 (Go): upgrade to 5.0.3 or later
    go get github.com/labstack/echo/v5@v5.0.3

Affected products

  • github.com/labstack/echo/v5 (Go) SEMVER:introduced=5.0.0,fixed=5.0.3

Identifiers

  • CVE-2026-25766
  • GHSA-pgvm-wxw2-hrv9
  • GO-2026-4502

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