CVEvulnerability

CVE-2026-112778

6.4 MEDIUM Published 2026-10-19 Modified 2026-10-23 Official page ↗
Status
Analyzed
Published
2026-10-19
Last modified
2026-10-23
Assigner
[email protected]
CVSS 4.0 ([email protected])
6.4 MEDIUM — CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-862

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.

Affected configurations

• traefik traefik (< 2.11.46) • traefik traefik (>= 3.0.0 < 3.6.16) • traefik traefik 3.7.0

Related

Weakness · CWE (1)

  • CWE-862 Missing Authorization weakness

References