CVE-2026-65601

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Source

https://cve.org/CVERecord?id=CVE-2026-65601

Import Source

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

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-65601

Aliases

GHSA-qq9q-x9w4-chhj

Published

2026-07-22T11:21:47.468Z

Modified

2026-07-24T04:02:42.274079180Z

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

{
    "cwe_ids": [
        "CWE-863"
    ],
    "cna_assigner": "VulnCheck",
    "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

Database specific

{
    "extracted_events": [
        {
            "introduced": "3.7.0"
        },
        {
            "fixed": "3.7.7"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v3.*

v3.7.0

v3.7.1

v3.7.2

v3.7.3

v3.7.4

v3.7.5

v3.7.6

Database specific

source

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