CVE-2026-4789 CVE-2026-4789

What is CVE-2026-4789?

CVE-2026-4789 is a critical server-side request forgery vulnerability in Kyverno, published on 30 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Kyverno, versions 1.16.0 and later, are vulnerable to SSRF due to unrestricted CEL HTTP functions.

Weakness: CWE-918

Which versions are affected by CVE-2026-4789?

4 open source packages ship an affected version, including github.com/kyverno/kyverno and kyverno. It affects 1 product.

Products include Kyverno Kyverno.

How do I fix CVE-2026-4789?

Upgrade github.com/kyverno/kyverno to 1.17.0 or later.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-4789 being exploited?

There is no known exploitation of CVE-2026-4789 in the wild and no public exploit code.

Other vulnerabilities in Kyverno

• CVE-2026-22039 Kyverno Cross-Namespace Privilege Escalation via Policy apiCall Critical 10.0
• CVE-2025-46342 Kyverno vulnerable to bypass of policy rules that use namespace selectors in match statements High 8.6
• CVE-2026-41323 Kyverno: ServiceAccount token leaked to external servers via apiCall service URL High 8.1
• CVE-2026-40868 kyverno apicall servicecall implicit bearer token injection leaks kyverno serviceaccount token High 8.1
• CVE-2022-47633 kyverno verifyImages rule bypass possible with malicious proxy/registry High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-kyverno-2026-4789, ECHO-f9cf-25f6-fcd8, GHSA-rggm-jjmc-3394, GO-2026-5621, MINI-79f7-x45p-7rph, MINI-8gfv-8g4p-9w22 and 2 more.