CVE-2026-67309

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-67309
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67309.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-67309
Aliases
  • GHSA-8rxv-jg7p-wvg3
Published
2026-08-01T12:22:18.191Z
Modified
2026-08-04T11:49:32.688266545Z
Severity
  • 7.8 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Traefik v3.7.0 Path Traversal via RewriteTarget Authentication Bypass
Details

Traefik versions >= v3.7.0 and <= v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider's RewriteTarget middleware (generated from the nginx.ingress.kubernetes.io/rewrite-target annotation). When an Ingress path uses a regex that captures attacker-controlled text without requiring a path separator (e.g., path /api(.*) with rewrite target /$1), a crafted request such as /api../admin matches the public router, is rewritten to a dot-segment traversal path (/../admin), and is forwarded without post-replacement normalization validation. A backend that normalizes dot segments resolves the path to a protected endpoint (e.g., /admin) reachable only through a separate router secured with BasicAuth, DigestAuth, or ForwardAuth, resulting in route-level authentication bypass. The issue is fixed in v3.7.8.

Database specific 
{
    "cwe_ids": [
        "CWE-22"
    ],
    "cna_assigner": "VulnCheck",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67309.json"
}
References

Affected packages

Git / github.com/traefik/traefik

Affected ranges

Type
GIT
Repo
https://github.com/traefik/traefik
Events
Introduced
04aa6bb4f9776f2ba87e5cd181d250e3610e6419
Fixed
4a87f05acfa2beb0211cee6e2ad4d002289752b5
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "3.7.0"
        },
        {
            "fixed": "3.7.8"
        }
    ]
}

Affected versions

v3.*
v3.7.0
v3.7.1
v3.7.2
v3.7.3
v3.7.4
v3.7.5
v3.7.6
v3.7.7

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67309.json"