CVE-2025-54386 Traefik's Client Plugin is Vulnerable to Path Traversal, Arbitrary File Overwrites and Remote Code Execution
Attackers can exploit path traversal in Traefik's WASM plugin installation to overwrite arbitrary files, leading to remote code execution and privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-54386?
CVE-2025-54386 is a high-severity path traversal vulnerability in Traefik Traefik, published on 1 Aug 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Traefik is an HTTP reverse proxy and load balancer. In versions 2.11.27 and below, 3.0.0 through 3.4.4 and 3.5.0-rc1, a path traversal vulnerability was discovered in WASM Traefik’s plugin installation mechanism. By supplying a maliciously crafted ZIP archive containing file paths with ../ sequences, an attacker can overwrite arbitrary files on the system outside of the intended plugin directory. This can lead to remote code execution (RCE), privilege escalation, persistence, or denial of service. This is fixed in versions 2.11.28, 3.4.5 and 3.5.0.
Which versions are affected by CVE-2025-54386?
9 open source packages ship an affected version, including github.com/traefik/traefik/v3, github.com/traefik/traefik and github.com/traefik/traefik/v2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/traefik/traefik/v3 Go | All versions | 3.4.5, 3.5.0 |
github.com/traefik/traefik/v3 Go | All versions | 3.4.5 |
github.com/traefik/traefik/v3 Go | All versions | 3.4.5 |
github.com/traefik/traefik/v3 Go | From 3.5.0-rc1 | 3.5.0 |
github.com/traefik/traefik/v3 Go | From 3.5.0-rc1 | 3.5.0 |
github.com/traefik/traefik Go | All versions | None |
3 more packages
github.com/traefik/traefik/v2 Go | All versions | 2.11.28 |
github.com/traefik/traefik/v2 Go | All versions | 2.11.28 |
github.com/traefik/traefik/v2 Go | All versions | 2.11.28 |
Products include Traefik Traefik.
How do I fix CVE-2025-54386?
Upgrade github.com/traefik/traefik/v3 to a fixed version for your release line: 3.4.5 or 3.5.0.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-54386 being exploited?
There is no known exploitation of CVE-2025-54386 in the wild and no public exploit code.
Other vulnerabilities in Traefik Traefik
- CVE-2024-45410 HTTP client can remove the X-Forwarded headers in Traefik
- CVE-2026-88877 Traefik v3.7.0 Authentication Bypass via from-to-www-redirect
- CVE-2026-85595 Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth
- CVE-2026-88007 Traefik HTTP/3 Backend NTLM Connection Reuse
- CVE-2026-88009 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging
Sources
Also known as CLEANSTART-2026-OD16960, ECHO-6f33-0c94-3aaa, GHSA-q6gg-9f92-r9wg, GO-2025-3835, MINI-jrm5-g9h6-7r2r, MINI-rh9v-34g4-p7pc.