Vulnerability in Traefik (July 27, 2026)

unknown

A vulnerability has been discovered in Traefik. It allows an attacker to bypass the security policy.

CSIRTS triage

What: A vulnerability in Traefik allows an attacker to bypass the security policy.
Who is affected: Deployments of Traefik that have the vulnerability present.
Urgency: Remediation is medium urgency as it could lead to unauthorized access.
Action: Update Traefik to the latest version to address this vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-FR Avis de sécurité (FR · national-cert · site)
Severity: unknown
Published: 2026-07-27
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0936/

Recent advisories for Traefik

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-67309: Traefik versions >= v3.7.0 and <= v3.7.7 contain a path traversal vulnerability in the Kuberne…nvd · 2026-08-01
unknownCVE-2026-65602: Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespac…nvd · 2026-07-22
unknownCVE-2026-65601: Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubern…nvd · 2026-07-22
unknownCVE-2026-65600: Traefik versions = v3.6.0 = v3.7.0 <= v3.7.6 contain an authentication bypass via path travers…nvd · 2026-07-22
unknownVulnerability in Traefik (July 16, 2026)cert-fr-avis · 2026-07-16
unknownMultiple vulnerabilities in Traefik (July 09, 2026)cert-fr-avis · 2026-07-09

Vulnerability in Traefik (July 27, 2026)

CSIRTS triage

Details

Recent advisories for Traefik

More from CERT-FR Avis de sécurité