How severe is CVE-2025-54386?

No CVSS score has been assigned to CVE-2025-54386 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2025-54386?

CVE-2025-54386 affects the following packages: github.com/traefik/traefik/v2 (Go), github.com/traefik/traefik/v3 (Go), github.com/traefik/traefik/v3 (Go). Ecosystems affected: Go.

How do I fix CVE-2025-54386?

Update github.com/traefik/traefik/v2 to 2.11.28 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-54386 is resolved across your whole dependency graph.

How do I detect CVE-2025-54386 in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/traefik/traefik/v2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2025-54386 if there is no patch (or I can't update yet)?

Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Is CVE-2025-54386 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-54386 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-54386?

CVE-2025-54386 has an EPSS (Exploit Prediction Scoring System) score of 1.4%, placing it in the 72th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2025-54386?

CVE-2025-54386 is classified as Path Traversal (CWE-22), CWE-30 (CWE-30). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2025-54386 published, and has it been updated?

CVE-2025-54386 was published on August 1, 2025 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

Not in CISA KEV

CVE-2025-54386 — traefik

Fix: traefik/plugin-service#71

CVE-2025-54386 is a Path Traversal vulnerability in github.com/traefik/traefik/v2. A fix is available for github.com/traefik/traefik/v2 — see the affected versions and patch details below.

Traefik's Client Plugin is Vulnerable to Path Traversal, Arbitrary File Overwrites and Remote Code Execution

Also known asGHSA-q6gg-9f92-r9wgGO-2025-3835

Published

Aug 1, 2025

Updated

Oct 28, 2026

Affected

3 pkgs

Patched

3 / 3

Exploits

None indexed

Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

A successful exploit gives an attacker total control of the affected component, not partial access.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-54386.

EPSS Exploitation Probability

via FIRST.org ↗

1.4%probability of exploitation in next 30 days

Lower Risk+0.09%

Lower risk than most CVEs72th percentile — riskier than 72% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

3 pkgs affected

🐹github.com/traefik/traefik/v2🐹github.com/traefik/traefik/v3🐹github.com/traefik/traefik/v3

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Summary

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. ✅ After investigation, it is confirmed that no plugins on the Catalog were affected. There is no known impact.

Details

The vulnerability resides in the WASM plugin extraction logic, specifically in the unzipFile function (/plugins/client.go). The application constructs file paths during ZIP extraction using filepath.Join(destDir, f.Name) without validating or sanitizing f.Name. If the ZIP archive contains entries with ../, the resulting path can escape the intended directory, allowing writes to arbitrary locations on the host filesystem.

Attack Requirements

There are several requirements needed to make this attack possible:

The Traefik server should be deployed with plugins enabled with a WASM plugin (yaegi plugins are not impacted).
The attacker should have write access to a remote plugin asset loaded by the Traefik server
The attacker should craft a malicious version of this plugin

Warning

As clearly stated in the documentation, plugins are experimental in Traefik, and unsafe plugins could damage your infrastructure:

Experimental Features Plugins can change the behavior of Traefik in unforeseen ways. Exercise caution when adding new plugins to production Traefik instances.

Impact

This vulnerability did not affect any plugin from the catalog. There is no known impact. Additionally, the catalog will also prevent any compromised plugin to be available across all Traefik versions. This vulnerability can allow an attacker to perform arbitrary file write outside the intended plugin extraction directory by crafting a malicious ZIP archive that includes ../ (directory traversal) in file paths.

Affected Packages

3 total 3 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/traefik/traefik/v2`	all versions	2.11.28`go get github.com/traefik/traefik/v2@v2.11.28`
🐹Go	`github.com/traefik/traefik/v3`	all versions	3.4.5`go get github.com/traefik/traefik/v3@v3.4.5`
🐹Go	`github.com/traefik/traefik/v3`	≥ 3.5.0-rc1&&< 3.5.0	3.5.0`go get github.com/traefik/traefik/v3@v3.5.0`

Affected Products

1 product · 5 configurations

Application

traefiktraefik

≥ 3.0.0 && < 3.4.4

1 version

3.5.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/traefik/traefik/v2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/traefik/traefik/v2 to 2.11.28 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-54386 is resolved across your whole dependency graph.
Workarounds
Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Workaround published by Red Hat

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Source: Red Hat security advisory for CVE-2025-54386 (CC BY 4.0)

Product	Fixed in	Advisory
Red Hat OpenShift Dev Spaces 3.27	`devspaces/traefik-rhel9:1774227265`	RHSA-2026:6192

Frequently Asked Questions

### Summary 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. **✅ After investigation, it is confirmed that no plugins on the [Catalog](https://plugins.traefik.io/plugins) were affected. There is no known impact.** ### Details The vulnerability resides in the W

O3 Security · Impact-Aware SCA

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