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Back to active CVEs
Medium · CVSS 5.9CVE-2026-118654GHSA-3PMX-CF9F-34XR

Echo static file middleware route protection bypass via encoded dot-dot traversalCVE-2026-118654

Answer in brief

CVE-2026-118654 records a Medium severity (CVSS 5.9) vulnerability in Echo static file middleware route protection bypass via encoded dot-dot traversal. The current sources do not mark it as known exploited. The current feed maps labstack/echo (generic), github.com/labstack/echo/v4 (go), github.com/labstack/echo/v5 (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 28, 2026Updated Oct 28, 2026Source checked Oct 28, 2026First seen by HOL Oct 28, 2026Material review Oct 28, 2026
Upstream Advisory

Record context

Vulnerability class
Path Traversal
EPSS
Not reported
CWE IDs
CWE-22
Source
CVE List V5
Source checked
Oct 28, 2026
References
6 linked sources
Open source record

Key facts

Risk
Medium · CVSS 5.9
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 5.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps labstack/echo (generic), github.com/labstack/echo/v4 (go), github.com/labstack/echo/v5 (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
labstack/echogeneric<4.16.0 || >=5.0.0 <5.4.04.16.0, 5.4.0
github.com/labstack/echo/v4go<4.16.04.16.0
github.com/labstack/echo/v5go<5.4.05.4.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for labstack/echo, github.com/labstack/echo/v4, github.com/labstack/echo/v5.
  2. 2Review the reported fix. Update labstack/echo to 4.16.0; github.com/labstack/echo/v4 to 4.16.0; github.com/labstack/echo/v5 to 5.4.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 28, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, Echo's static file handlers can normalize dot segments after route matching and serve a file through a public static route even though the corresponding direct path is protected by route-level middleware. An unauthenticated attacker can read files that an application intended to protect with route-level middleware, when those files are also reachable through a static filesystem mount after path normalization. This vulnerability is the result of an incomplete fix for CVE-2026-55677. This issue is fixed in 4.16.0 and 5.4.0.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Echo: CSRF Protection Bypass via MethodOverride Rewriting POST to Safe MethodSame labstack/echo package
  • Echo: middleware.Static: `%2F`-encoded path bypasses route/group middleware guarding a statically-served pathSame labstack/echo package
  • Echo: Reverse Proxy Forwards Attacker-Supplied X-Real-IP to Upstream by DefaultSame labstack/echo package
  • Echo: Reflected Cross-Site Scripting (XSS) via unsanitized JSONP callback in Context.JSONP / Context.JSONPBlobSame labstack/echo package
  • Echo: Rate Limiter Bypass via Spoofed X-Forwarded-For Header in Default ConfigurationSame labstack/echo package
  • Echo: Static Middleware Double-Unescape Path TraversalSame labstack/echo package