CVE-2026-3288 Details
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.)
A vulnerability exists in ingress-nginx versions prior to 1.13.8, 1.14.4, and 1.15.0, allowing the `nginx.ingress.kubernetes.io/rewrite-target` annotation to inject arbitrary configuration into nginx. This injection could lead to arbitrary code execution within the ingress-nginx controller and the unauthorized disclosure of Secrets accessible to the controller, which by default can access all cluster-wide Secrets.
Users can upgrade to ingress-nginx versions 1.13.8, 1.14.4, or 1.15.0. For instructions on upgrading, refer to the 'Upgrading Ingress-nginx' documentation. Ingress-nginx users can also use admission control to block the use of the rewrite-target annotation as a temporary mitigation.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 30, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/bvabhishek/CVE-2026-3288-lab | CISA-ADP | MitigationThird Party Advisory |
| http://www.openwall.com/lists/oss-security/2026/03/09/8 | CVE | Mailing ListThird Party Advisory |
| https://github.com/kubernetes/kubernetes/issues/137560 | [email protected] | Issue TrackingThird Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
| CWE-20 | Improper Input Validation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| kubernetes ingress-nginx | < 1.13.8 >= 1.14.0, < 1.14.4 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 6, 2026 | Initial Analysis | [email protected] |
| Apr 30, 2026 | CVE Modified | CISA-ADP |
| Mar 10, 2026 | CVE Modified | CVE |
| Mar 9, 2026 | New CVE Received | [email protected] |