CVE-2026-65601

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Source
https://cve.org/CVERecord?id=CVE-2026-65601
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-65601.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-65601
Aliases
Downstream
MINI (2)
openSUSE (1)
SUSE (1)
Related
Published
2026-07-22T11:21:47Z
Modified
2026-10-22T10:33:36Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N CVSS Calculator
Summary
Traefik before 3.7.7 Namespace Confusion via HTTPRoute ExtensionRef
Details

Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API provider. When resolving HTTPRoute.spec.rules[].backendRefs[].filters[].extensionRef, Traefik used the backend Service namespace instead of the HTTPRoute namespace. A low-privileged route author holding a ReferenceGrant for a cross-namespace Service could therefore bind a Traefik Middleware from the backend namespace without a separate grant for that middleware, potentially injecting trusted reverse-proxy identity headers into downstream requests. The issue is fixed in version 3.7.7.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65601.json"
}
References

Affected packages

Git / github.com/traefik/traefik

Affected ranges

Type
GIT
Repo
https://github.com/traefik/traefik
Events
Introduced
04aa6bb4f9776f2ba87e5cd181d250e3610e6419
Fixed
b2c18b1e39fbe2099e4dce927e4e6e56674ede0f
Fixed
26c96a3935cafb473f4a5bae1886560d9aa4e4f0
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "3.7.0"
                },
                {
                    "fixed": "3.7.7"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "26c96a3935cafb473f4a5bae1886560d9aa4e4f0"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v3.*
v3.7.0
v3.7.1
v3.7.2
v3.7.3
v3.7.4

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-65601.json"