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CVE-2026-32695— Traefik has Knative Ingress Rule Injection that Allows Host Restriction Bypass

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是Traefik开源的一款反向代理与负载均衡工具。 Traefik 3.6.11之前版本和3.7.0-ea.2之前版本存在注入漏洞，该漏洞源于Knative提供程序通过将用户控制的值插入到反引号分隔的规则表达式中来构建路由器规则而未进行转义，可能导致在多租户集群中路由未经授权的流量到受害者服务并导致跨租户流量暴露。

AI Predicted 8.6 Difficulty: Easy EPSS 0.53% · P43

Affected Version Matrix 2

VendorProduct Version RangeStatus
traefik traefik < 3.6.11 affected
>= 3.7.0-ea.1, < 3.7.0-ea.2 affected
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I. Basic Information for CVE-2026-32695

Vulnerability Information
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Vulnerability Title
Traefik has Knative Ingress Rule Injection that Allows Host Restriction Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Traefik is an HTTP reverse proxy and load balancer. Prior to versions 3.6.11 and 3.7.0-ea.2, Traefik's Knative provider builds router rules by interpolating user-controlled values into backtick-delimited rule expressions without escaping. In live cluster validation, Knative `rules[].hosts[]` was exploitable for host restriction bypass (for example `tenant.example.com`) || Host(`attacker.com`), producing a router that serves attacker-controlled hosts. Knative `headers[].exact` also allows rule-syntax injection and proves unsafe rule construction. In multi-tenant clusters, this can route unauthorized traffic to victim services and lead to cross-tenant traffic exposure. Versions 3.6.11 and 3.7.0-ea.2 patch the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Traefik 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Traefik是Traefik开源的一款反向代理与负载均衡工具。 Traefik 3.6.11之前版本和3.7.0-ea.2之前版本存在注入漏洞，该漏洞源于Knative提供程序通过将用户控制的值插入到反引号分隔的规则表达式中来构建路由器规则而未进行转义，可能导致在多租户集群中路由未经授权的流量到受害者服务并导致跨租户流量暴露。
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 < 3.6.11 -

II. Public POCs for CVE-2026-32695

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III. Intelligence Information for CVE-2026-32695

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Vendor Advisories for CVE-2026-32695 (1)

Vendor Pages for CVE-2026-32695 (2)

IV. Related Vulnerabilities

Same product: traefik
Same vendor: traefik
Same weakness: CWE-74

V. Comments for CVE-2026-32695

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