CVE-2026-40868 | Kyverno up to 1.16.3 API Call sensitive information

VDB-358561 · CVE-2026-40868 · GCVE-0-2026-40868 KYVERNO UP TO 1.16.3 API CALL SENSITIVE INFORMATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.0 $0-$5k 1.74+ Summaryinfo A vulnerability was found in Kyverno up to 1.16.3. It has been rated as critical. Impacted is an unknown function of the component API Call Handler. This manipulation causes sensitive information. This vulnerability is handled as CVE-2026-40868. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised. Detailsinfo A vulnerability classified as critical was found in Kyverno up to 1.16.3. Affected by this vulnerability is an unknown function of the component API Call Handler. The manipulation with an unknown input leads to a sensitive information vulnerability. The CWE definition for the vulnerability is CWE-922. The product stores sensitive information without properly limiting read or write access by unauthorized actors. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is: 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. The advisory is shared at github.com. This vulnerability is known as CVE-2026-40868 since 04/15/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue. Upgrading to version 1.16.4 eliminates this vulnerability. Productinfo Name Kyverno Version 1.16.0 1.16.1 1.16.2 1.16.3 Website Product: https://github.com/kyverno/kyverno/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.2 VulDB Meta Temp Score: 7.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 8.1 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Sensitive information CWE: CWE-922 / CWE-200 / CWE-284 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Kyverno 1.16.4 Timelineinfo 04/15/2026 CVE reserved 04/21/2026 +6 days Advisory disclosed 04/21/2026 +0 days VulDB entry created 04/21/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-40868 (🔒) GCVE (CVE): GCVE-0-2026-40868 GCVE (VulDB): GCVE-100-358561 Entryinfo Created: 04/21/2026 20:59 Changes: 04/21/2026 20:59 (62) Complete: 🔍 Cache ID: 99:B6D:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸