ingress-nginx rewrite-target nginx configuration injection
Priority HIGH 73CWE-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/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.)
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.06993 94th percentileScored 2026-11-07
Fix Fixed ingress-nginx (Kubernetes): 1.13.8, 1.14.4, 1.15.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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 1.13.8; before 1.14.4; before 1.15.0 | 1.13.8, 1.14.4, 1.15.0 | Patch available | CNA |
- ingress-nginx VendorKubernetes Affected before 1.13.8; before 1.14.4; before 1.15.0 Fixed in 1.13.8, 1.14.4, 1.15.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:* | before 1.13.8; 1.14.0 to before 1.14.4 | Vulnerable | Kubernetes |
- cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:* Versions before 1.13.8; 1.14.0 to before 1.14.4 Vulnerable ·Kubernetes
Remediation
- Fix · CNA ingress-nginx (Kubernetes) Fixed in 1.13.8, 1.14.4, 1.15.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-3288
- 2026-10-03 Alias added: GHSA-c56h-j8gw-3v54
- 2026-10-25 EPSS moved to the 90th–95th percentile
References
More Kubernetes Ingress-nginx vulnerabilities
- TI-2023-04644 Improper input validation in Kubernetes ingress-nginx CVSS 3.1HIGH 8.8
- TI-2023-04643 Improper input validation in Kubernetes ingress-nginx CVSS 3.1HIGH 8.8
- TI-2022-04479 Improper input validation in Kubernetes ingress-nginx CVSS 3.1HIGH 8.8
- TI-2021-07835 Ingress-nginx path can be pointed to service account token file CVSS 3.1HIGH 8.1
- TI-2021-07833 Ingress-nginx custom snippets allows retrieval of ingress-nginx serviceaccount token and secrets across all namespaces CVSS 3.1HIGH 7.6
- TI-2021-07836 Ingress-nginx directive injection via annotations CVSS 3.1HIGH 7.6
Sources
- CVE-2026-3288 · CVE Program
- CVE-2026-3288 · NVD
- FIRST EPSS
- GHSA-c56h-j8gw-3v54 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences