Skip to content
Patch Next
Sign inAdd to your agent

← Actionable
High, CVSS 7.8amended

Traefik: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass

CVE-2026-67309GHSA-8rxv-jg7p-wvg3

What to do

Partial vendor fix. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

Add to your agent

Affected packages

  • Go github.com/traefik/traefik/v3

    Affected
    >= 3.7.0, <= 3.7.7
    Fixed in
    3.7.8

  • Go github.com/traefik/traefik/v2

    Affected
    every version
    Fixed in
    no fixed version recorded

  • Go github.com/traefik/traefik

    Affected
    every version
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
7.8 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N · score source
EPSS
  • CVE-2026-67309: 0.66% estimated exploitation activity in the next 30 days; percentile 51.58 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Summary There is a high severity vulnerability in Traefik's Kubernetes Ingress NGINX provider. When an Ingress uses the nginx.ingress.kubernetes.io/rewrite-target annotation with a regular expression that captures attacker-controlled text without requiring a path separator (for example path /api(.) with rewrite target /$1), the generated RewriteTarget middleware can turn an initially safe request path into a dot-segment traversal path after the router has already been selected. Patches - https://github.com/traefik/traefik/releases/tag/v3.7.8 For more information If you have any questions or comments about this advisory, please open an issue. <details <summaryOriginal Description</summary Summary Traefik's Kubernetes Ingress NGINX provider creates an internal RewriteTarget middleware for the nginx.ingress.kubernetes.io/rewrite-target annotation. When an Ingress path captures attacker-controlled text without requiring a path separator, the middleware can turn an initially safe path…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 4 · amended ·

    Amended from ghsa record GHSA-8rxv-jg7p-wvg3

  2. Revision 3 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 2 · amended ·

    Amended from osv record GO-2026-6207

  4. Revision 1 · created ·

    Published from osv record GHSA-8rxv-jg7p-wvg3

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-67309

Advisory: Traefik: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass
IDs: CVE-2026-67309, GHSA-8rxv-jg7p-wvg3
Record: https://patchnext.com/advisories/cve-2026-67309 (revision 4, source checked 26 Oct 2026, 15:28 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: github.com/traefik/traefik/v3 3.7.8. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/traefik/traefik/v3: affected >= 3.7.0, <= 3.7.7; fixed in 3.7.8
- Go github.com/traefik/traefik/v2: affected every version
- Go github.com/traefik/traefik: affected every version

## Suggested inspection (read-only)
- Go github.com/traefik/traefik/v3: check the installed version with your package manager.
- Go github.com/traefik/traefik/v2: check the installed version with your package manager.
- Go github.com/traefik/traefik: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/traefik/traefik/v3, github.com/traefik/traefik/v2, github.com/traefik/traefik.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-8rxv-jg7p-wvg3 (OSV record GHSA-8rxv-jg7p-wvg3 lists affected ranges: Go github.com/traefik/traefik/v3 >=3.7.0 <3.7.8 (fixed))
- Verified: https://osv.dev/vulnerability/GO-2026-6207 (OSV record GO-2026-6207 lists affected ranges: Go github.com/traefik/traefik >=0; Go github.com/traefik/traefik/v2 >=0; Go github.com/traefik/traefik/v3 >=3.7.0 <3.7.8 (fixed))
- Verified: https://github.com/advisories/GHSA-8rxv-jg7p-wvg3 (GitHub-reviewed advisory GHSA-8rxv-jg7p-wvg3 lists affected ranges: Go github.com/traefik/traefik/v3 >=3.7.0 <=3.7.7)

Commands are suggestions: review each one before running it.

Loading voting…