CVE-2026-23881
Kyverno Denial of Service via Context Variable Amplification in Policy Engine
MEDIUM 6.5EPSS 0.6%
Kyverno is a policy engine designed for cloud native platform engineering teams. Versions prior to 1.16.3 and 1.15.3 have unbounded memory consumption in Kyverno's policy engine that allows users with policy creation privileges to cause denial of service by crafting policies that exponentially amplify string data through context variables. Versions 1.16.3 and 1.15.3 contain a patch for the vulnerability.
- Affected
- kyverno
- CVSS v3.1 NVD
- 6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS v3.1 GITHUB
- 7.7 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H - EPSS
- 0.60% chance of exploitation in the next 30 days, 48th percentile
- Published
- 2026-01-27
Proof-of-concept exploits (1)
Security advisories
- kyverno/kyverno/security/advisories/GHSA-r2rj-wwm5-x6mq
- kyverno/kyverno/commit/7a651be3a8c78dcabfbf4178b8d89026bf3b850f