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CVE

CVE-2026-23881

Kyverno Denial of Service via Context Variable Amplification in Policy Engine
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CVE

CVE-2026-23881

Kyverno Denial of Service via Context Variable Amplification in Policy Engine

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.7
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23881.json, https://github.com/kyverno/kyverno/commit/7a651be3a8c78dcabfbf4178b8d89026bf3b850f, https://github.com/kyverno/kyverno/commit/f5617f60920568a301740485472bf704892175b7, https://github.com/kyverno/kyverno/security/advisories/GHSA-r2rj-wwm5-x6mq, https://nvd.nist.gov/vuln/detail/CVE-2026-23881

Severity

7.7

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.7
EPSS Probability
0.00053%
EPSS Percentile
0.16476%
Introduced Version
0,18f9549cb2af30ec0537cd97f3200228d9f42d4b
Fix Available
13ba08e97c90c058184db9204754b900aeaf084e,188151e6b60b192aabcbc24943c3159e5cfab5da

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