CVE-2026-23881GHSA-R2RJ-WWM5-X6MQBIT-KYVERNO-2026-23881GO-2026-4382
Kyverno Denial of Service via Context Variable Amplification in Policy Engine
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.15.3, 1.16.3
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: poc
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- kyverno kyverno
fixed in 1.15.3; From 1.16.0 · fixed in 1.16.3
- github.com/kyverno/kyvernoGo
fixed in 1.15.3
- github.com/kyverno/kyvernoGo
From 1.16.0-rc.1 · fixed in 1.16.3
- github.com/kyverno/kyvernoGo
fixed in 1.15.3; From 1.16.0-rc.1 · fixed in 1.16.3