CVE-2026-85594

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Source
https://cve.org/CVERecord?id=CVE-2026-85594
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85594.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-85594
Aliases
  • GHSA-m6wx-622r-48r9
Published
2026-09-04T11:29:58.771Z
Modified
2026-09-06T03:30:26.224748767Z
Severity
  • 7.0 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N CVSS Calculator
Summary
Traefik v3.7.1 crossProviderNamespaces Bypass via Service Middleware
Details

Traefik versions from v3.7.1 fail to enforce crossProviderNamespaces restrictions on the traefik.ingress.kubernetes.io/service.middlewares Service annotation in the Kubernetes Ingress provider. A namespace-limited tenant excluded from the allowlist can attach an operator-owned middleware to its Service, and if that middleware injects backend credentials, recover them at a controlled backend.

Database specific 
{
    "cwe_ids": [
        "CWE-639"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85594.json",
    "cna_assigner": "VulnCheck"
}
References

Affected packages

Git / github.com/traefik/traefik

Affected ranges

Type
GIT
Repo
https://github.com/traefik/traefik
Events
Introduced
fa49e2bcad7ffd8a80accdf1fae1ae480913d93d
Last affected
e8f398ee30ca5643158ea9094b701b8eae9849e5
Database specific
Show details 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "3.7.1"
        },
        {
            "last_affected": "3.7.12"
        }
    ]
}

Affected versions

v3.*
v3.7.1
v3.7.10
v3.7.11
v3.7.12
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/cve-osv-conversion/osv-output/CVE-2026-85594.json"