CVE-2026-122306 (GCVE-0-2026-122306)

Vulnerability from cvelistv5 – Published: 2026-11-05 02:25 – Updated: 2026-11-05 02:25
VLAI
Title
Kyverno before 1.19.2 Denial of Service via Exponential-Time Wildcard Matching
Summary
Kyverno before 1.19.2 contains a denial of service vulnerability that allows namespaced policy authors to exhaust admission controller CPU by submitting pathological wildcard patterns. Attackers can create a Policy with crafted match and exclude names evaluated by ValidateMatchExcludeConflict, pinning cores and causing cluster-wide webhook timeouts that block resource operations.
Severity
8.3 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
7.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE
  • CWE-407 - Inefficient Algorithmic Complexity
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7415 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
kyverno kyverno Affected: 0 , < 1.19.2 (semver)
Unaffected: 1.19.2 (semver)
    cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-10-21 00:00
Credits
1diot9
Show details on NVD website
To clipboard 

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}



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