VulnerabilityAnalyzed

CVE-2026-23881

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…

MEDIUM 6.5EPSS 0.54%

Does this matter?

Lower severity and a low EPSS score (0.54%). Track it; it rarely justifies an emergency change on its own.

Description

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.

CVSS 3.1: 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.54% probability · 44th percentile
CISA KEV: Not listed
Weakness: CWE-770
Affected: kyverno/kyverno
Source: security-advisories@github.com

References

https://github.com/kyverno/kyverno/commit/7a651be3a8c78dcabfbf4178b8d89026bf3b850fPatch
https://github.com/kyverno/kyverno/commit/f5617f60920568a301740485472bf704892175b7Patch
https://github.com/kyverno/kyverno/security/advisories/GHSA-r2rj-wwm5-x6mqExploit, Mitigation, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.