How severe is CVE-2026-4789?

CVE-2026-4789 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-4789 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4789?

CVE-2026-4789 affects Kyverno. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4789?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-4789 have an EU (EUVD) identifier?

Yes. CVE-2026-4789 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17241.

When was CVE-2026-4789 published?

CVE-2026-4789 was published on 2026-03-30 and last updated on 2026-06-17.

CVE-2026-4789

CVE-2026-4789 is a critical-severity vulnerability in Kyverno with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17241
Weakness: CWE-918
Affected product: Kyverno
Published: 2026-03-30
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2026-4789?: 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 a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-4789 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4789?: CVE-2026-4789 affects Kyverno. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4789?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-4789 have an EU (EUVD) identifier?: Yes. CVE-2026-4789 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17241.
When was CVE-2026-4789 published?: CVE-2026-4789 was published on 2026-03-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*

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