CVE-2026-122305
High
Description
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.
SeverityHigh
CVSS7.7
Exploit probability—
ProductKyverno
PublishedNov 5, 2026
First seenNov 5, 2026
Weakness typeCWE-835CWE-835
How to fix
Update
- kyverno kyverno1.19.2 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kyverno kyverno | v < 1.19.2 | 1.19.2 |
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