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CVE-2026-67309— Traefik v3.7.0 Path Traversal via RewriteTarget Authentication Bypass

Quick assessment

Affected
traefik traefik
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Traefik是Traefik公司开源的一款反向代理与负载均衡工具。 Traefik 3.7.0版本至3.7.7版本存在路径遍历漏洞，该漏洞源于Kubernetes Ingress NGINX provider的RewriteTarget中间件在路径重写时未进行规范化验证，可能导致路由级身份验证绕过。

CVSS 7.8 · High EPSS 0.66% · P50

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
traefik traefik 3.7.0< 3.7.8 affected
3.7.8 unaffected
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I. Basic Information for CVE-2026-67309

Vulnerability Information
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Vulnerability Title
Traefik v3.7.0 Path Traversal via RewriteTarget Authentication Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Traefik versions >= v3.7.0 and <= v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider's RewriteTarget middleware (generated from the nginx.ingress.kubernetes.io/rewrite-target annotation). When an Ingress path uses a regex that captures attacker-controlled text without requiring a path separator (e.g., path /api(.*) with rewrite target /$1), a crafted request such as /api../admin matches the public router, is rewritten to a dot-segment traversal path (/../admin), and is forwarded without post-replacement normalization validation. A backend that normalizes dot segments resolves the path to a protected endpoint (e.g., /admin) reachable only through a separate router secured with BasicAuth, DigestAuth, or ForwardAuth, resulting in route-level authentication bypass. The issue is fixed in v3.7.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Traefik 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Traefik是Traefik公司开源的一款反向代理与负载均衡工具。 Traefik 3.7.0版本至3.7.7版本存在路径遍历漏洞，该漏洞源于Kubernetes Ingress NGINX provider的RewriteTarget中间件在路径重写时未进行规范化验证，可能导致路由级身份验证绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
traefik traefik 3.7.0 ~ 3.7.8 -

II. Public POCs for CVE-2026-67309

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8680 chars
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III. Intelligence Information for CVE-2026-67309

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Patches & Fixes for CVE-2026-67309 (1)

Vendor Advisories for CVE-2026-67309 (2)

IV. Related Vulnerabilities

Same product: traefik
Same vendor: traefik
Same weakness: CWE-22

V. Comments for CVE-2026-67309

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