CVE-2026-65602Public exploitNetwork attack vector

Authorization bypass via unchecked TCP transport reference

Published Jul 22, 2026 · Updated Jul 22, 2026

Incorrect authorization in Traefik Proxy 3.6.17 through 3.6.22 and 3.7.1 through 3.7.6 allows remote authenticated users to reuse TCP transports. The Kubernetes CRD provider accepts IngressRouteTCP service serversTransport values ending in @file without applying the configured crossProviderNamespaces allowlist. A low-privileged Kubernetes user outside that allowlist can make Traefik use file-provider TCP transport settings, including backend mTLS certificates, SPIFFE identity, or PROXY protocol.

CVSS severity5.3
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Traefik Proxy 3.6.17 through 3.6.22 and 3.7.1 through 3.7.6 allows remote authenticated users to reuse TCP transports. The Kubernetes CRD provider accepts IngressRouteTCP service serversTransport values ending in @file without applying the configured crossProviderNamespaces allowlist. A low-privileged Kubernetes user outside that allowlist can make Traefik use file-provider TCP transport settings, including backend mTLS certificates, SPIFFE identity, or PROXY protocol.

The record

CVE
CVE-2026-65602
Published
Jul 22, 2026
Updated
Jul 22, 2026
Vendor
Traefik Labs
Product
Traefik Proxy
Classifications
CWE-863
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.6.0 <3.6.23
  2. Affected versionversion=3.7.0 <3.7.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Traefik Labs · Traefik Proxyversion=3.6.0 <3.6.23; version=3.7.0 <3.7.7

Published CVSS scores

5.3SnykCVSS: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 describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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