Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-114640— Traefik v3.7.0 before v3.7.14 mTLS Header Spoofing via Ingress-NGINX 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 从 v3.7.0 到 v3.7.13 版本（即 v3.7.14 之前）在 Kubernetes Ingress-NGINX 提供程序中存在一个身份验证绕过漏洞。该漏洞允许在明文 HTTP 路由器上转发客户端提供的 头部。当同时禁用 并启用 时，未认证的攻击者可以发送 头部，并指定伪造的证书主题（subject）和颁发者（issuer），从而冒充 mTLS 身份。

CVSS 8.7 · High
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-114640

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Traefik v3.7.0 before v3.7.14 mTLS Header Spoofing via Ingress-NGINX HTTP Router
Source: CVE Program / CVE List V5
Vulnerability Description
Traefik from v3.7.0 before v3.7.14 contains an authentication bypass vulnerability in its Kubernetes Ingress-NGINX provider that forwards client-supplied Ssl-Client-* headers on the plaintext HTTP router. When ssl-redirect is disabled alongside auth-tls-pass-certificate-to-upstream, unauthenticated attackers can send Ssl-Client-Verify: SUCCESS with a chosen certificate subject and issuer to impersonate mTLS identities.
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
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
traefik traefik 3.7.0 ~ 3.7.14 -

II. Public POCs for CVE-2026-114640

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-114640

请登录查看更多情报信息。

Other References for CVE-2026-114640 (2)

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-2026-114639 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-2026-114636 8.7 HIGH Traefik v3.7.13 Authentication Bypass via ssl-passthrough Ingress HTTP Router
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-290

V. Comments for CVE-2026-114640

No comments yet

Leave a comment