CVE-2026-3288 | ingress-nginx rewrite-target nginx configuration injection

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.)

Published: 2026-03-09 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-3288 is rated Moderate Risk (40.6/100): CVSS High severity, with low exploitation likelihood (EPSS 0.05%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-3288

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-22 0.06% 0.05% -0.01%
2 2026-05-16 0.05% 0.06% +0.01%
3 2026-05-01 — 0.05% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-3288

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2026-3288

GitHub Security Advisory for CVE-2026-3288

GHSA-c56h-j8gw-3v54 · Severity: high — A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/rewrite...

Affected software / configurations for CVE-2026-3288

Vendor Product Version Raw CPE
kubernetes ingress-nginx < 1.13.8 cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:*
kubernetes ingress-nginx >= 1.14.0, < 1.14.4 cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:*

References for CVE-2026-3288

URL Tags
https://github.com/kubernetes/kubernetes/issues/137560 Issue Tracking Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/03/09/8 Mailing List Third Party Advisory
https://github.com/bvabhishek/CVE-2026-3288-lab Mitigation Third Party Advisory
cvelogic Threat Intelligence