CVE-2026-40868

Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to 1.16.4, kyverno’s apiCall servicecall helper implicitly injects Authorization: Bearer ... using the kyverno controller serviceaccount token when a policy does not explicitly set an Authorization header. Because context.apiCall.service.url is policy-controlled, this can send the kyverno serviceaccount token to an attacker-controlled endpoint (confused deputy). Namespaced policies are blocked from servicecall usage by the namespaced urlPath gate in pkg/engine/apicall/apiCall.go, so this report is scoped to ClusterPolicy and global context usage. This vulnerability is fixed in 1.16.4.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/kyverno/kyverno/security/advisories/GHSA-q93q-v844-jrqp	Exploit Mitigation Vendor Advisory
https://github.com/kyverno/kyverno/security/advisories/GHSA-q93q-v844-jrqp	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-21 19:16

Updated : 2026-06-17 10:45

NVD link : CVE-2026-40868

Mitre link : CVE-2026-40868

CVE.ORG link : CVE-2026-40868

JSON object : View

Products Affected

kyverno

kyverno

CWE

CWE-922

Insecure Storage of Sensitive Information

{"id": "CVE-2026-40868", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40868", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-22T13:34:55.762312Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "kyverno", "product": "kyverno", "versions": [{"status": "affected", "version": "< 1.16.4"}]}]}], "published": "2026-04-21T19:16:18.420", "references": [{"url": "https://github.com/kyverno/kyverno/security/advisories/GHSA-q93q-v844-jrqp", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/kyverno/kyverno/security/advisories/GHSA-q93q-v844-jrqp", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-922"}]}], "descriptions": [{"lang": "en", "value": "Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to 1.16.4, kyverno\u2019s apiCall servicecall helper implicitly injects Authorization: Bearer ... using the kyverno controller serviceaccount token when a policy does not explicitly set an Authorization header. Because context.apiCall.service.url is policy-controlled, this can send the kyverno serviceaccount token to an attacker-controlled endpoint (confused deputy). Namespaced policies are blocked from servicecall usage by the namespaced urlPath gate in pkg/engine/apicall/apiCall.go, so this report is scoped to ClusterPolicy and global context usage. This vulnerability is fixed in 1.16.4."}], "lastModified": "2026-06-17T10:45:47.693", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "380BEA9B-8371-4EA9-A225-86EBBE80F50F", "versionEndExcluding": "1.16.4"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}