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CVE-2026-23881

Kyverno Denial of Service via Context Variable Amplification in Policy Engine

Published: Jan 27, 2026Updated: Feb 2, 2026 Sources: CVE List NVD GHSACWE-770
7.7HIGH
NVD MITRE
EPSS Score
0.5%
Top 56.5%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-770

Affected Products

kyverno
oss-projectaka kyverno.io
kyvernoOn-prem
Cloud & SaaS / container-orchestration
Go
package-ecosystem
github.com/kyverno/kyverno
OSS Libraries

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/kyverno/kyverno/commit/7a651be3a8c78dcabfbf4178b8d89026bf3b850f
github.com
https://github.com/kyverno/kyverno/commit/f5617f60920568a301740485472bf704892175b7
github.com
https://github.com/kyverno/kyverno/security/advisories/GHSA-r2rj-wwm5-x6mq
github.com
and 2 more references View all →

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