CVE-2026-22039 — AI Deep Analysis Summary

Q: What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Kyverno Policy `apiCall` has an **Authorization Bypass** flaw. 💥 **Consequences**: Breaks namespace isolation. Allows cross-namespace read/write access. Critical integrity loss.

Q: Root Cause? (CWE/Flaw)

🛡️ **CWE**: CWE-269 (Improper Privilege Management). 🔍 **Flaw**: The `apiCall` feature in Kyverno Policies fails to enforce proper authorization boundaries, allowing actions outside the intended scope.

Q: Who is affected? (Versions/Components)

📦 **Vendor**: Kyverno. 📉 **Affected Versions**: • **< 1.16.3** (1.16.x series) • **< 1.15.3** (1.15.x series). ✅ **Fixed**: 1.15.3+ and 1.16.3+.

Q: What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: • **Read**: Access data in other namespaces. • **Write**: Modify resources in other namespaces. • **Privilege**: Escalate via policy execution context.

Q: Is exploitation threshold high? (Auth/Config)

🔑 **Threshold**: **Low**. • **Auth Required**: Yes (PR:L - Privileges Required: Low). • **Complexity**: Low (AC:L). • **UI**: None (UI:N). ⚡ Easy to exploit if you have basic policy creation rights.

Q: Is there a public Exp? (PoC/Wild Exploitation)

🚫 **Public Exp?**: **No**. • `pocs` array is empty. • No wild exploitation reported yet. • Focus is on patching, not active exploits.

Q: How to self-check? (Features/Scanning)

🔍 **Self-Check**: 1. Check Kyverno version (`kubectl get deployment kyverno -n kyverno`). 2. Audit Policies using `apiCall`. 3. Scan for cross-namespace resource access in policy specs.

Q: Is it fixed officially? (Patch/Mitigation)

✅ **Fixed?**: **Yes**. • **Patch**: Upgrade to **1.15.3** or **1.16.3**. • **Refs**: GitHub commits `eba60fa` and `e0ba4de`. • **Advisory**: GHSA-8p9x-46gm-qfx2.

Q: What if no patch? (Workaround)

🛑 **No Patch?**: • **Mitigation**: Restrict `apiCall` usage in Policies. • **RBAC**: Limit who can create/modify Kyverno Policies. • **Network**: Enforce strict network policies between namespaces.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. • **CVSS**: 9.8 (Critical). • **Impact**: S:C (Scope Changed), C:H/I:H/A:H. • **Action**: Patch immediately. Namespace isolation is broken.

Updated May 06, 2026 CVSS 10.0 · Critical

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Kyverno Policy `apiCall` has an **Authorization Bypass** flaw. <br>💥 **Consequences**: Breaks namespace isolation. Allows cross-namespace read/write access. Critical integrity loss.

Q2Root Cause? (CWE/Flaw)

🛡️ **CWE**: CWE-269 (Improper Privilege Management). <br>🔍 **Flaw**: The `apiCall` feature in Kyverno Policies fails to enforce proper authorization boundaries, allowing actions outside the intended scope.

Q3Who is affected? (Versions/Components)

📦 **Vendor**: Kyverno. <br>📉 **Affected Versions**: <br>• **< 1.16.3** (1.16.x series) <br>• **< 1.15.3** (1.15.x series). <br>✅ **Fixed**: 1.15.3+ and 1.16.3+.

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: <br>• **Read**: Access data in other namespaces. <br>• **Write**: Modify resources in other namespaces. <br>• **Privilege**: Escalate via policy execution context.

Q5Is exploitation threshold high? (Auth/Config)

🔑 **Threshold**: **Low**. <br>• **Auth Required**: Yes (PR:L - Privileges Required: Low). <br>• **Complexity**: Low (AC:L). <br>• **UI**: None (UI:N). <br>⚡ Easy to exploit if you have basic policy creation rights.

Q6Is there a public Exp? (PoC/Wild Exploitation)

🚫 **Public Exp?**: **No**. <br>• `pocs` array is empty. <br>• No wild exploitation reported yet. <br>• Focus is on patching, not active exploits.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: <br>1. Check Kyverno version (`kubectl get deployment kyverno -n kyverno`). <br>2. Audit Policies using `apiCall`. <br>3. Scan for cross-namespace resource access in policy specs.

Q8Is it fixed officially? (Patch/Mitigation)

✅ **Fixed?**: **Yes**. <br>• **Patch**: Upgrade to **1.15.3** or **1.16.3**. <br>• **Refs**: GitHub commits `eba60fa` and `e0ba4de`. <br>• **Advisory**: GHSA-8p9x-46gm-qfx2.

Q9What if no patch? (Workaround)

🛑 **No Patch?**: <br>• **Mitigation**: Restrict `apiCall` usage in Policies. <br>• **RBAC**: Limit who can create/modify Kyverno Policies. <br>• **Network**: Enforce strict network policies between namespaces.

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. <br>• **CVSS**: 9.8 (Critical). <br>• **Impact**: S:C (Scope Changed), C:H/I:H/A:H. <br>• **Action**: Patch immediately. Namespace isolation is broken.

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Vulnerability detail Full AI analysis (login) kyverno CWE-269