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VULNERABILITIES

CVE-2026-112778 Details

Description

Traefik before 2.11.46, 3.x before 3.6.17, and 3.7.0 lack namespace validation for Ingress and Service annotations in the Kubernetes Ingress provider, allowing references to Middlewares, ServersTransports, and TLSOptions in other namespaces. Attackers able to create or update Ingress or Service resources in one namespace can set router.middlewares or service.serverstransport annotations to obtain another tenant's injected credentials or reuse its client certificates, bypassing namespace-based tenant isolation.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/traefik/traefik/security/advisories/GHSA-rh7m-2m44-x32f [email protected]Vendor AdvisoryPatch
https://www.vulncheck.com/advisories/traefik-before-2.11.46-3.6.17-and-3.7.1-cross-namespace-resource-reference-via-kubernetes-annotations [email protected]Third Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-862Missing Authorization[email protected]

Affected Products

ProductVersions
traefik traefik
< 2.11.46
>= 3.0.0, < 3.6.16
3.7.0

CPE

  • cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*
  • cpe:2.3:a:traefik:traefik:3.7.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-112778
NVD Published Date:
Oct 19, 2026
NVD Last Modified:
Oct 23, 2026
Source:
[email protected]
CVE-2026-112778 Details - Not Deferred