CVE-2026-238817.7HighCWE-770
CVE-2026-23881: Kyverno Denial of Service via Context Variable Amplification in Policy Engine
No fix listed · Affected: kyverno · Exploitation: not established
ExploitationNot established
Not in CISA KEV as of catalogue 2026.11.13 (13 Nov)
- In CISA KEV: not seen
- Exploited (reported): not seen
- Scanning observed: not seen
- Proof of concept public: not seen
- Not establishedNothing in the sources we check
0.6%probability of exploitation in the next 30 days
50th percentile
050100
Higher than 50% of scored CVEs
7.7HighCVSS 3.1
LowMediumHighCrit.
DescriptionNVD
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.
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- kyverno
- Published
- January 2026
Coverage1 article · 1 outlet
First in our coverage: SecurityOnline, 30 Jan.
- Cluster Admin for All: Critical Kyverno Flaw (CVSS 10) Shatters IsolationSecurityOnline · first in our coverage · mentions it in passing
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