Directory Traversal Affecting traefik-3 package, versions <3.7.7-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.41% (34th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-TRAEFIK3-18586726
  • published8 Aug 2026
  • disclosed22 Jul 2026

Introduced: 22 Jul 2026

NewCVE-2026-65600  (opens in a new tab)
CWE-22  (opens in a new tab)

How to fix?

Upgrade Minimos:latest traefik-3 to version 3.7.7-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream traefik-3 package and not the traefik-3 package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

Traefik versions <= v2.11.51, >= v3.6.0 <= v3.6.22, and >= v3.7.0 <= v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured with a regex that captures user-controlled path segments without a mandatory path separator (e.g. regex "^/api(.*)", replacement "/$1"), the middleware forwards the replaced path to the backend without validating that it matches its normalized form. An unauthenticated remote attacker can send a crafted request (e.g. GET /api../admin) that produces an un-normalized path such as /../admin, which a backend that normalizes paths resolves to a protected route, bypassing authentication middleware. Fixed in v2.11.52, v3.6.23, and v3.7.7.

CVSS Base Scores

version 3.1