Skip to main content
CVE-2025-1097VulnerabilityPublished Updated

CVE-2025-1097: kubernetes ingress-nginx · Improper Input Validation

Affects kubernetes ingress-nginxSource CVE Database V5

0

Not known to be exploited · public exploit available (Exploit-DB) · 36% EPSS · CVSS 8.8 High.

Data as of 26 Oct 2026, 07:57 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
36.9% chance of exploitation in 30 days – higher than 98% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 24 Mar 2025

  2. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  3. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by kubernetes

    , 45 days before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. First Exploit-DB entry (opens in a new tab)

    Ingress-NGINX Admission Controller v1.11.1 - FD Injection to RCE

    , 317 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Affected software

ProductAffectedFixed in
GitHubkubernetes/ingress-nginxpkg:github/kubernetes/ingress-nginxOther threatsAffected
  • =0
  • =1.12.0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

To mitigate CVE-2025-1097, organizations should immediately restrict permissions to create or modify Ingress resources, limiting this capability to trusted administrators only. Implement strict admission controls and validation policies using Kubernetes Admission Controllers or Open Policy Agent (OPA) to detect and block malicious or unexpected annotations such as auth-tls-match-cn. Monitor ingress-nginx controller logs and Kubernetes audit logs for suspicious Ingress resource changes. Isolate the ingress-nginx controller by running it with the least privileges necessary, including restricting access to Secrets via Kubernetes RBAC policies and using service accounts with minimal permissions. Consider deploying network policies to limit ingress-nginx communication scope. Stay alert for official patches or updates from the Kubernetes ingress-nginx project and apply them promptly once available. Additionally, employ runtime security tools to detect anomalous behavior within ingress-nginx pods. Regularly review and rotate Secrets to minimize exposure if compromise occurs.

Description

A security issue was discovered in ingress-nginx https://github.com/kubernetes/ingress-nginx where the `auth-tls-match-cn` 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.)

References

Community reviews

Loading reviews…