How severe is CVE-2026-41323?

CVE-2026-41323 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-41323 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41323?

CVE-2026-41323 primarily affects Kyverno. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-41323?

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

Does CVE-2026-41323 have an EU (EUVD) identifier?

Yes. CVE-2026-41323 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25389.

When was CVE-2026-41323 published?

CVE-2026-41323 was published on 2026-04-24 and last updated on 2026-06-17.

CVE-2026-41323

CVE-2026-41323 is a high-severity vulnerability in Kyverno with a CVSS 3.x base score of 8.1. 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-200.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25389
Weakness: CWE-200
Affected product: Kyverno
Published: 2026-04-24
Last modified: 2026-06-17

Description

Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4, Kyverno's apiCall feature in ClusterPolicy automatically attaches the admission controller's ServiceAccount token to outgoing HTTP requests. The service URL has no validation — it can point anywhere, including attacker-controlled servers. Since the admission controller SA has permissions to patch webhook configurations, a stolen token leads to full cluster compromise. Versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4 patch the issue.

Frequently asked questions

What is CVE-2026-41323?: Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4, Kyverno's apiCall feature in ClusterPolicy automatically attaches the admission controller's ServiceAccount token to outgoing HTTP requests. The service URL has no validation — it can point anywhere, including attacker-controlled servers. Since the admission controller SA has permissions to patch webhook configurations, a stolen token leads to full cluster compromise. Versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4 patch the issue.
How severe is CVE-2026-41323?: CVE-2026-41323 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-41323 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41323?: CVE-2026-41323 primarily affects Kyverno. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-41323?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-41323 have an EU (EUVD) identifier?: Yes. CVE-2026-41323 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25389.
When was CVE-2026-41323 published?: CVE-2026-41323 was published on 2026-04-24 and last updated on 2026-06-17.

References

Affected products (2)

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

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