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NVD description
Contour is a Kubernetes ingress controller using Envoy proxy. From v1.19.0 to before v1.33.4, v1.32.5, and v1.31.6, Contour's Cookie Rewriting feature is vulnerable to Lua code injection. An attacker with RBAC permissions to create or modify HTTPProxy resources can craft a malicious value in spec.routes[].cookieRewritePolicies[].pathRewrite.value or spec.routes[].services[].cookieRewritePolicies[].pathRewrite.value that results in arbitrary code execution in the Envoy proxy. The cookie rewriting feature is internally implemented using Envoy's HTTP Lua filter. User-controlled values are interpolated into Lua source code using Go text/template without sufficient sanitization. The injected code only executes when processing traffic on the attacker's own route, which they already control. However, since Envoy runs as shared infrastructure, the injected code can also read Envoy's xDS client credentials from the filesystem or cause denial of service for other tenants sharing the Envoy instance. This vulnerability is fixed in v1.33.4, v1.32.5, and v1.31.6.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
🔴 (Contour), Lua code injection, #CVE-2026-41246 (High) https://dailycve.com/contour-lua-code-injection-cve-2026-41246-high/
Post summary
The tweet announces the disclosure of a high‑severity Lua code injection vulnerability (CVE‑2026‑41246) affecting Contour, without providing proof‑of‑concept details or evidence of exploitation.
CVE-2026-41246 Contour is a Kubernetes ingress controller using Envoy proxy. From v1.19.0 to before v1.33.4, v1.32.5, and v1.31.6, Contour's Cookie Rewriting feature is vulnerable t… https://www.cve.org/CVERecord?id=CVE-2026-41246
Post summary
The statement announces CVE‑2026‑41246, identifying affected Contour Kubernetes ingress controller versions and the vulnerable Cookie Rewriting feature, without detailing exploitation or remediation.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | projectcontour | contour | - | kubernetes | - |