Directory Traversal Affecting listmonk package, versions <6.2.0-r8


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.43% (36th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LISTMONK-19270643
  • published27 Aug 2026
  • disclosed26 Jun 2026

Introduced: 26 Jun 2026

CVE-2026-55677  (opens in a new tab)
CWE-22  (opens in a new tab)

How to fix?

Upgrade Chainguard listmonk to version 6.2.0-r8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream listmonk package and not the listmonk package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, Echo's router and static file handler disagree on URL path decoding. The router matches routes using the raw encoded path (preserving %2F as-is), while StaticDirectoryHandler unescapes %2F to / before resolving filesystem paths. This allows an attacker to bypass route-level access controls and read static files without authorization. This vulnerability is fixed in 4.15.3 and 5.2.0.

CVSS Base Scores

version 3.1