kubernetes/ingress-nginx · Security
ingress-nginx comment-based nginx configuration injection
- GHSA ID
- GHSA-f53h-mxv9-cp98
- CVE ID
- CVE-2026-4342
- Severity
- high
- Published
- Updated
- CVSS
- 8.8 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS v3
- 8.8 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description
A security issue was discovered in ingress-nginx where a combination of Ingress annotations can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)
CWEs
- CWE-20 · Improper Input Validation
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-4342 ↗
- https://github.com/kubernetes/kubernetes/issues/137893 ↗
- http://www.openwall.com/lists/oss-security/2026/03/19/9 ↗
- https://github.com/kubernetes/ingress-nginx/commit/5183b7d861377a9a2f6d2acaf44f8f6abd5cd0aa ↗
- https://github.com/advisories/GHSA-f53h-mxv9-cp98 ↗