SSRF Vulnerability in Kyverno CEL HTTP Functions (v

Publication date: 2026-03-30

Last updated on: 2026-04-03

Assigner: CERT/CC

Description

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

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-03-30

Last Modified

2026-04-03

Generated

2026-07-06

AI Q&A

2026-03-31

EPSS Evaluated

2026-07-05

NVD

CVE-2026-4789

Affected Vendors & Products

Vendor	Product	Version / Range
kyverno	kyverno	From 1.16.0 (inc) to 1.17.1 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-918	The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

Executive Summary

This vulnerability affects Kyverno versions 1.16.0 and later. It is a Server-Side Request Forgery (SSRF) issue caused by unrestricted Common Expression Language (CEL) HTTP functions.

Impact Analysis

An attacker could exploit the SSRF vulnerability to make unauthorized HTTP requests from the Kyverno server. This could potentially allow the attacker to access internal resources or services that are not normally accessible.

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