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CVE-2026-114636— Traefik v3.7.13 Authentication Bypass via ssl-passthrough Ingress HTTP Router

Quick assessment

Affected
traefik traefik
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Traefik v3.7.13（早于 v3.7.14）在 Kubernetes Ingress NGINX 提供者中存在访问控制绕过漏洞：当在非 TLS 入口点为启用 ssl-passthrough 的 Ingress 生成 HTTP 路由器时，系统从未应用该 Ingress 的访问控制注解。因此，未认证的攻击者只需通过 HTTP 入口点并指定 Ingress 的主机名，即可访问受 auth-type、auth-url 或 whitelist-source-range 注解保护的后端服务，且整个过程不会留下任何日志

CVSS 8.7 · High
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I. Basic Information for CVE-2026-114636

Vulnerability Information
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Vulnerability Title
Traefik v3.7.13 Authentication Bypass via ssl-passthrough Ingress HTTP Router
Source: CVE Program / CVE List V5
Vulnerability Description
Traefik v3.7.13 before v3.7.14 contains an access-control bypass in the Kubernetes Ingress NGINX provider, where the HTTP router generated for ssl-passthrough Ingresses on non-TLS entry points never applies the Ingress's access-control annotations. Unauthenticated attackers reaching the HTTP entry point with the Ingress host can access backends protected by auth-type, auth-url, or whitelist-source-range annotations, with nothing logged.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
traefik traefik 3.7.13 ~ 3.7.14 -

II. Public POCs for CVE-2026-114636

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III. Intelligence Information for CVE-2026-114636

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Vendor Advisories for CVE-2026-114636 (1)

Vendor Pages for CVE-2026-114636 (1)

Same Patch Batch · traefik · 2026-10-22 · 9 CVEs total

CVE-2026-114638 8.7 HIGH Traefik v3.7.0 before v3.7.14 Client CA Mix-up via auth-tls-secret Name Collision
CVE-2026-114640 8.7 HIGH Traefik v3.7.0 before v3.7.14 mTLS Header Spoofing via Ingress-NGINX HTTP Router
CVE-2026-114639 8.7 HIGH Traefik before 2.11.58 and 3.7.14 Authentication Bypass via Negotiate Connection Pool
CVE-2026-114635 8.7 HIGH Traefik before v2.11.58 and v3.7.14 SNI Check Bypass via HTTP/2 Scheme
CVE-2026-114642 8.7 HIGH Traefik before 2.11.58 and 3.7.14 TLS Config Bypass via NTLM/Kerberos Round Tripper
CVE-2026-114637 8.7 HIGH Traefik v3.2.0 before v3.7.14 FastProxy NTLM/Negotiate Connection Pool Identity Leak
CVE-2026-114656 7.5 HIGH Traefik before 2.11.58 and 3.7.13 mTLS Bypass via Negated Host Matcher
CVE-2026-114641 3.7 LOW Traefik before 2.11.58 and 3.7.14 Race Condition in NTLM/Kerberos Round Tripper

IV. Related Vulnerabilities

Same product: traefik
Same vendor: traefik
Same weakness: CWE-306

V. Comments for CVE-2026-114636

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