GHSA-x4mj-7f9g-29h4 · 深刻度: high · エコシステム: go — Contour has Lua code injection via Cookie Path Rewrite Policy
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.
総合評価: CVE-2026-41246 は中リスク(45.7/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 0.48%、38 パーセンタイル) 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置(高いほど相対的に深刻)を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ(新 − 旧) |
|---|---|---|---|---|
| 1 | 2026-06-30 | 0.44% | 0.48% | +0.04% |
| 2 | 2026-06-15 | 0.07% | 0.44% | +0.37% |
| 3 | 2026-04-24 | — | 0.07% | — |
EPSS の全履歴 (全 3 件)
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 8.1 | 3.1 | HIGH |
|
2.8 | 5.2 | [email protected] |
| 8.1 | 3.1 | HIGH |
|
2.8 | 5.2 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
GHSA-x4mj-7f9g-29h4 · 深刻度: high · エコシステム: go — Contour has Lua code injection via Cookie Path Rewrite Policy
| vendor | priority | summary | link |
|---|---|---|---|
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2026-41246 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| projectcontour | contour | >= 1.19.0, < 1.31.6 | cpe:2.3:a:projectcontour:contour:*:*:*:*:*:kubernetes:*:* |
| projectcontour | contour | >= 1.32.0, < 1.32.5 | cpe:2.3:a:projectcontour:contour:*:*:*:*:*:kubernetes:*:* |
| projectcontour | contour | >= 1.33.0, < 1.33.4 | cpe:2.3:a:projectcontour:contour:*:*:*:*:*:kubernetes:*:* |