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Vulnerability record · CVE-2026-84200 · published 1 September 2026

CVE-2026-84200: Improper access control vulnerability

Kyverno versions v1.9.0 through v1.12.7 contain a policy exception handling flaw. When a policy in enforce mode is combined with two PolicyExceptions, the less restrictive exception takes precedence, allowing an attacker to bypass the policy by crafting a resource name that matches the second exception's name pattern (e.g., '*ingress*'). This can be used to circumvent policies such as one blocking hostPath volumes. Fixed in v1.13.0.

9.4 CVSS 4.0 Critical EPSS 0.27% · top 82.3% CWE-284 · Improper access control Awaiting Analysis
9.4CVSS 4.0 base score
0.27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
10 Sep 2026Last modified by NVD

Description

Kyverno versions v1.9.0 through v1.12.7 contain a policy exception handling flaw. When a policy in enforce mode is combined with two PolicyExceptions, the less restrictive exception takes precedence, allowing an attacker to bypass the policy by crafting a resource name that matches the second exception's name pattern (e.g., '*ingress*'). This can be used to circumvent policies such as one blocking hostPath volumes. Fixed in v1.13.0.

CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/kyverno/kyverno/security/advisories/GHSA-gg4x-fgg2-h9w9
https://www.vulncheck.com/advisories/kyverno-before-1.13.0-policy-bypass-via-multiple-exceptions
https://github.com/kyverno/kyverno/security/advisories/GHSA-gg4x-fgg2-h9w9

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Source: NIST National Vulnerability Database (record CVE-2026-84200), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.