CVE-2026-3288: A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/rewrite-target` Ingres

This week

HIGH 8.8WATCHLISTUPGRADE

CVE-2026-3288 is a high-severity flaw (CVSS 8.8) affecting ingress-nginx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 this priority

High severity
EPSS top 6%: very likely to be exploited
CISA SSVC: public proof of concept
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	6.5% (top 6%)
CISA exploited list	No
Weakness	CWE-20
Published	2026-03-09
Last modified	2026-06-17

Publisher (CNA): Kubernetes · Vendor: kubernetes

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-09 21:16 UTCPublished CVE record published
2026-06-17 10:43 UTCUpdated Record last modified

kubernetes ingress-nginx UPGRADE

Affected: < 1.13.8 · >= 1.14.0 and < 1.14.4

Fixed in: 1.13.8, 1.14.4

Safe to downgrade to: a release before 1.14.0

1. Check installed version

apt-cache policy ingress-nginx || rpm -q ingress-nginx || ingress-nginx --version

2. UPGRADE to 1.13.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ingress-nginx

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ingress-nginx

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.14.0 (Debian / Ubuntu)

apt-cache madison ingress-nginx sudo apt install ingress-nginx=<VERSION_BEFORE_1.14.0> sudo apt-mark hold ingress-nginx

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ingress-nginx sudo dnf downgrade ingress-nginx-<VERSION_BEFORE_1.14.0> sudo dnf versionlock add ingress-nginx

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · python-hatchling · FIXED · 1.33.0-1.fc46 · FEDORA-2026-3ccbf17812 · source

sudo dnf upgrade --advisory=FEDORA-2026-3ccbf17812

Fedora ELN · pie · FIXED · 1.5.3-1.eln159 · FEDORA-2026-e009523caa · source

sudo dnf upgrade --advisory=FEDORA-2026-e009523caa

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: SnailSploit/CVE-2026-3288 (3 stars)
GitHub PoC: bvabhishek/CVE-2026-3288-lab (1 stars)

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-3288?

ingress-nginx: upgrade to 1.13.8, 1.14.4. Exact commands for each OS are on this page.

Is CVE-2026-3288 being exploited?

CVE-2026-3288 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-3288 affect?

CVE-2026-3288 affects ingress-nginx. Severity is high (CVSS 8.8). 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 ingre

How urgent is CVE-2026-3288?

Priority 62/100. High severity; EPSS top 6%: very likely to be exploited; CISA SSVC: public proof of concept; On your watchlist

Software pages

nginx vulnerabilities · Kubernetes vulnerabilities

References

← Back to latest CVEs