CVE-2026-4789 — CRITICAL (9.8)

Q: What is CVE-2026-4789?

CVE-2026-4789 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Kyverno, versions 1.16.0 and later, are vulnerable to SSRF due to unrestricted CEL HTTP functions.

Q: How severe is CVE-2026-4789?

CVE-2026-4789 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Q: Is there a patch for CVE-2026-4789?

Check the references section above for vendor advisories and patch information. Affected products include: Kyverno Kyverno.

Vulnerability Description

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

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Kyverno	Kyverno	>= 1.16.0, <= 1.17.1

Related Weaknesses (CWE)

CWE-918

References

https://github.com/kyverno/kyvernoProduct
https://kb.cert.org/vuls/id/655822Third Party Advisory
https://portswigger.net/web-security/ssrfTechnical Description
https://www.kb.cert.org/vuls/id/655822Third Party Advisory

FAQ

What is CVE-2026-4789?

CVE-2026-4789 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Kyverno, versions 1.16.0 and later, are vulnerable to SSRF due to unrestricted CEL HTTP functions.

How severe is CVE-2026-4789?

CVE-2026-4789 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-4789?

Check the references section above for vendor advisories and patch information. Affected products include: Kyverno Kyverno.