CVE-2026-4342
ingress-nginx comment-based nginx configuration injection
- Published
- Mar 19, 2026
- Updated
- Mar 21, 2026
- Assigning CNA
- kubernetes
- Evidence observed
- Aug 25, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 72.6%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.)
Sources
1- CVE-2026-4342Exploit
Exploit code for CVE-2026-4342, a vulnerability in an unspecified product, providing proof-of-concept or exploitation functionality.
Responsible use
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