by Kastro
Paper/Archive/CVE-2026-84200

CVE-2026-84200

kyverno kyverno — Kyverno before v1.13.0 Policy Bypass via Multiple Exceptions

EPSS 0.3%public exploitCVSS 9.4
critical.is priorityof 100
42
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 19.7.197 × 203.9Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
kyverno< 1.13.01.13.0CNA

Scores by source

VulnCheck (CNA)9.4CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
VulnCheck (CNA)9.0CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/kyverno/kyverno/security/advisories/GHSA-gg4x-fgg2-h9w9writeupvulncheck.com/advisories/kyverno-before-1.13.0-policy-bypass-via-multiple-exceptions