CVE-2026-3288
HIGHCVSS v3
8.8
HIGH
EPSS Score
0.0%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/rewrite-target` Ingress annotation 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.)
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 3/9/2026
- Last Modified
- 5/6/2026
Frequently Asked Questions
What is CVE-2026-3288?
A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/rewrite-target` Ingress annotation 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.)
Is CVE-2026-3288 actively exploited?
Active exploitation of CVE-2026-3288 has not been confirmed. The EPSS score is 0.0%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-3288?
CVE-2026-3288 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string 3.1.
Is CVE-2026-3288 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.