RCE in Projectcontour Contour
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 to Lua code injection. An attacker with RBAC permissions to create or modi…
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.001 (21.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Projectcontour Contour — versions >= 1.33.0, < 1.33.4, >= 1.32.0, < 1.32.5, >= 1.19.0, < 1.31.6
Weakness classification (CWE)
References
- https://github.com/projectcontour/contour/security/advisories/GHSA-x4mj-7f9g-29h4 (x_refsource_CONFIRM, Patch, Vendor Advisory)
- https://github.com/projectcontour/contour/releases/tag/v1.31.6 (x_refsource_MISC, Release Notes)
- https://github.com/projectcontour/contour/releases/tag/v1.32.5 (x_refsource_MISC, Release Notes)
- https://github.com/projectcontour/contour/releases/tag/v1.33.4 (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-41246?
- CVE-2026-41246 is a high-severity vulnerability in Projectcontour Contour, classified under Code Injection. CVSS score: 8.1/10. Published 2026-04-23.
- How severe is CVE-2026-41246?
- High severity. CVSS v3 base score is 8.1 out of 10.