Bug 2567489 (CVE-2026-122305) - CVE-2026-122305 github.com/kyverno/kyverno: Kyverno: Denial of Service via unbounded variable substitution loop
Summary: CVE-2026-122305 github.com/kyverno/kyverno: Kyverno: Denial of Service via un...
Keywords:
Status: NEW
Alias: CVE-2026-122305
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-05 22:02 UTC by OSIDB Bzimport
Modified: 2026-11-05 22:36 UTC (History)
3 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-11-05 22:02:03 UTC 
Kyverno before 1.19.2 contains a denial of service vulnerability in substituteVariablesIfAny that allows low-privileged users to hang the admission webhook via self-referential variable templates. Attackers can create resources whose annotations re-introduce the embedded policy variable, causing unbounded substitution loops that exhaust CPU and memory and block cluster-wide admission.
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