Widely used ingress-nginx controller; RCE and secret leakage threaten core infra.
CVE-2026-3288
Ingress-nginx rewrite-target allows config injection, enabling RCE and secret exposure.
Is CVE-2026-3288 being exploited?
Not confirmed. CVE-2026-3288 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 6.3% probability of exploitation in the next 30 days.
How severe is CVE-2026-3288?
CVE-2026-3288 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-3288?
Yes. A fix has been recorded for CVE-2026-3288. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-3288 affect?
CVE-2026-3288 affects ingress-nginx, Kubernetes Ingress Controller, Kubernetes clusters using ingress-nginx. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-3288?
Upgrade to patched ingress-nginx version
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE via rewrite-target annotation; may expose cluster Secrets accessible to the controller.
Patch when possible
- affected< 1.13.8
- affected< 1.14.4
- affected< 1.15.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.