CVE-2026-71327

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Source
https://cve.org/CVERecord?id=CVE-2026-71327
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-71327.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-71327
Aliases
Downstream
CGA (2)
MINI (3)
openSUSE (1)
SUSE (1)
Related
Published
2026-08-06T16:38:11Z
Modified
2026-10-22T10:33:37Z
Severity
  • 7.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Traefik: Gateway API route identity collision allows cross-namespace backend hijacking
Details

Traefik is an open source HTTP reverse proxy and load balancer. From 3.0.0 until 3.6.25 and 3.7.10, Traefik's Kubernetes Gateway API provider in pkg/provider/kubernetes/gateway/httproute.go, grpcroute.go, tcproute.go, and tlsroute.go builds HTTPRoute, GRPCRoute, TCPRoute, and TLSRoute router and service identities by hyphen-concatenating namespace, route name, Gateway identity, entry point, and rule index, allowing colliding Routes to overwrite another namespace's backend. This issue is fixed in 3.6.25 and 3.7.10.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-694"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71327.json"
}
References

Affected packages

Git / github.com/traefik/traefik

Affected ranges

Type
GIT
Repo
https://github.com/traefik/traefik
Events
Introduced
d99d2f95e66a28ee8180634dc80fdf13ba68c62a
Fixed
4b18b24b0b002dcc80e0640c6088a87d813de29a
Introduced
04aa6bb4f9776f2ba87e5cd181d250e3610e6419
Fixed
2a2349356c01b1b1f7ecddb0c17b30c97f5241e7
Fixed
a764166656f0cd337f917ac76315c381cca844f9
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "3.0.0"
                },
                {
                    "fixed": "3.6.25"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "cpe": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "3.7.0"
                },
                {
                    "fixed": "3.7.10"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "a764166656f0cd337f917ac76315c381cca844f9"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v3.6.25",
            "range": [
                {
                    "fixed": "4b18b24b0b002dcc80e0640c6088a87d813de29a"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "original_tag": "v3.7.10",
            "range": [
                {
                    "fixed": "2a2349356c01b1b1f7ecddb0c17b30c97f5241e7"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

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
v3.7.8
v3.7.9

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-71327.json"