Skip to content
OpenAdvisories
High · 8.8 Public exploit CVE-2026-4342 EUVD-2026-13343GHSA-f53h-mxv9-cp98GO-2026-4796

ingress-nginx comment-based nginx configuration injection

Published Mar 19, 2026 · Updated Mar 21, 2026 · Assigned by kubernetes

Vendor: Kubernetes Product: ingress-nginx Package: k8s.io/ingress-nginx Ecosystem: Go

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.)

Affected products

VendorProductAffectedFixed
Kubernetes ingress-nginx < 1.13.9, < 1.14.5, < 1.15.1 1.13.9

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

openSUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 govulncheck-vulndb 0.0.20260723T184607-160000.1.1 openSUSE-SU-2026:21483-1
openSUSE Leap 15.6 govulncheck-vulndb 0.0.20260326T203309-150000.1.155.2 SUSE-SU-2026:1135-1

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Affected packages

EcosystemPackageAffectedFixedRecord
Go k8s.io/ingress-nginx < 0.0.0-20260319175635-5183b7d86137 0.0.0-20260319175635-5183b7d86137 GHSA-f53h-mxv9-cp98

Advisories 3

References