Public proof of conceptFix available

CVE-2026-3288

Q: Is CVE-2026-3288 actively exploited?

A proof-of-concept exploit exists for CVE-2026-3288, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2026-3288?

CVE-2026-3288 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2026-03-09
Fixed in1.14.4 · 1.13.8
WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.)

Timeline

dates in UTC

2026-03-0921:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-25 15:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-3288?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-3288?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Kubernetes ingress-nginx

Branch	Affected	Fixed in	Source
1.14	≥ 1.14.0, < 1.14.4	1.14.4	NVD
1.13	< 1.13.8	1.13.8	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Kubernetes ingress-nginx to 1.14.4 · 1.13.8

Advisories and patches

github.comMitigation

Detection

read 2026-10-25 00:28 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 2 repositories, unverifiedSnailSploit/CVE-2026-3288bvabhishek/CVE-2026-3288-lab

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionpoc2026-04-30
OpenCVESSVC decisionpoc—
CNACVSS 3.18.8read 2026-10-23
CNAweakness (CWE)CWE-20read 2026-10-23
FIRST EPSSEPSS score6.4 %2026-10-25
PoC-in-GitHubproof of concept2read 2026-10-25

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2026-03-09
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2026-3288?

Is CVE-2026-3288 actively exploited?

A proof-of-concept exploit exists for CVE-2026-3288, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-3288?

CVE-2026-3288 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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