CVE-2026-67309Public exploitNetwork attack vectorHinoki check available

Authentication bypass via unnormalized RewriteTarget paths

Published Aug 1, 2026 · Updated Aug 1, 2026

Path traversal in Traefik Proxy 3.7.0 through 3.7.7 allows remote attackers to bypass route-level authentication via crafted request paths. The Kubernetes Ingress NGINX RewriteTarget middleware forwards a capture-derived path without checking whether dot-segment normalization changes it. Exploitation requires a permissive rewrite regex, a protected path on the same normalizing backend, and router-level access controls.

CVSS severity7.8
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in Traefik Proxy 3.7.0 through 3.7.7 allows remote attackers to bypass route-level authentication via crafted request paths. The Kubernetes Ingress NGINX RewriteTarget middleware forwards a capture-derived path without checking whether dot-segment normalization changes it. Exploitation requires a permissive rewrite regex, a protected path on the same normalizing backend, and router-level access controls.

The record

CVE
CVE-2026-67309
Published
Aug 1, 2026
Updated
Aug 1, 2026
Vendor
Traefik Labs
Product
Traefik Proxy
Classifications
CWE-22, CWE-288, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.7.0 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Traefik Labs · Traefik Proxyversion=3.7.0 <*

Published CVSS scores

9.1GitHub Security Advisory original reportCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
7.8GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-288Authentication Bypass Using an Alternate Path or Channel
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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