ingress-nginx auth-proxy-set-headers nginx configuration injection
Priority MEDIUM 41CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/auth-proxy-set-headers` 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.)
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0052 44th percentileScored 2026-11-07
Fix Fixed ingress-nginx (Kubernetes): 1.12.5, 1.13.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Kubernetes | ingress-nginx | before 1.12.5; before 1.13.1 | 1.12.5, 1.13.1 | Patch available | CNA |
- ingress-nginx VendorKubernetes Affected before 1.12.5; before 1.13.1 Fixed in 1.12.5, 1.13.1 Patch available CNA
Remediation
- Fix · CNA ingress-nginx (Kubernetes) Fixed in 1.12.5, 1.13.1
Timeline
- 2026-10-02 Threatist record created from CVE-2025-15566
- 2026-10-03 Alias added: GHSA-whpv-427c-7hc3
References
More Kubernetes vulnerabilities
- TI-2025-01719 ingress-nginx admission controller RCE escalation CVSS 3.1CRITICAL 9.8
- TI-2018-16130 Improper privilege management in Kubernetes CVSS 3.0CRITICAL 9.8
- TI-2025-00932 ingress-nginx controller - configuration injection via unsanitized mirror annotations CVSS 3.1HIGH 8.8
- TI-2019-08418 Kubernetes kubelet exposes /debug/pprof info on healthz port CVSS 3.1HIGH 8.2
- TI-2026-02839 ingress-nginx rewrite-target nginx configuration injection CVSS 3.1HIGH 8.8
- TI-2025-18233 ingress-nginx controller - configuration injection via unsanitized auth-url annotation CVSS 3.1HIGH 8.8
Sources
- CVE-2025-15566 · CVE Program
- CVE-2025-15566 · NVD
- FIRST EPSS
- GHSA-whpv-427c-7hc3 · GitHub Advisory Database · CC BY 4.0
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