CVE-2026-23881— Kyverno Denial of Service via Context Variable Amplification in Policy Engine
Quick assessment
Affected
kyverno kyverno
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Kyverno是Kyverno开源的一个为 Kubernetes 设计的策略引擎。 Kyverno 1.16.3之前版本和1.15.3之前版本存在安全漏洞，该漏洞源于策略引擎存在无限制内存消耗，可能导致具有策略创建权限的用户通过特制策略造成拒绝服务。
Possible ATT&CK Techniques 1 AI
T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-23881
Vulnerability Information
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Vulnerability Title
Kyverno Denial of Service via Context Variable Amplification in Policy Engine
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Kyverno 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kyverno是Kyverno开源的一个为 Kubernetes 设计的策略引擎。 Kyverno 1.16.3之前版本和1.15.3之前版本存在安全漏洞，该漏洞源于策略引擎存在无限制内存消耗，可能导致具有策略创建权限的用户通过特制策略造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-23881
| # | POC Description | Source Link | Shenlong Link |
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Patches & Fixes for CVE-2026-23881 (2)
-
Merge commit from fork (#14844) · kyverno/kyverno@7a651be · GitHub x_refsource_MISC
-
Merge commit from fork (#14846) · kyverno/kyverno@f5617f6 · GitHub x_refsource_MISC
IV. Related Vulnerabilities
Same product: kyverno
-
CVE-2026-100706
kyverno before 1.19.1 Privilege Escalation via Policy apiCal -
CVE-2026-100707
Kyverno before 1.19.1 Namespace Isolation Bypass via Percent -
CVE-2026-100705
Kyverno before 1.19.1 SSRF via legacy apiCall service execut -
CVE-2026-100704
Kyverno before 1.19.1 ImageValidatingPolicy Exception Bypass -
CVE-2026-100703
Kyverno before 1.19.1 Cross-Namespace Data Access via global
Same vendor: kyverno
-
CVE-2026-100706
kyverno before 1.19.1 Privilege Escalation via Policy apiCal -
CVE-2026-100707
Kyverno before 1.19.1 Namespace Isolation Bypass via Percent -
CVE-2026-100705
Kyverno before 1.19.1 SSRF via legacy apiCall service execut -
CVE-2026-100704
Kyverno before 1.19.1 ImageValidatingPolicy Exception Bypass -
CVE-2026-100703
Kyverno before 1.19.1 Cross-Namespace Data Access via global
Same weakness: CWE-770
-
CVE-2026-105127
LaraDashboard 1.4.2 before 1.4.8 Resource Exhaustion via Pas -
CVE-2026-97873
Legacy PBES1 and PKCS#12 PBE iteration count honoured unboun -
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Seroval: Memory exhaustion via unchecked TypedArray length i -
CVE-2026-66054
Apache Thrift: C++ THeaderTransport does not enforce configu -
CVE-2026-61374
Apache Thrift: Java TSaslTransport post-auth data-frame miss
V. Comments for CVE-2026-23881
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