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TI-2026-29524 Aliases CVE-2026-40868GHSA-q93q-v844-jrqp

kyverno apicall servicecall implicit bearer token injection leaks kyverno serviceaccount token

Priority HIGH 70CWE-922Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-922.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00289 21st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed kyverno (kyverno): 1.16.4github.com/kyverno/kyverno (Go): 1.17.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
kyvernokyvernobefore 1.16.41.16.4Patch availableCNA
—github.com/kyverno/kyverno (Go)before 1.17.01.17.0Patch availableGHSA-q93q-v844-jrqp
  • kyverno Vendorkyverno Affected before 1.16.4 Fixed in 1.16.4 Patch available CNA
  • github.com/kyverno/kyverno (Go) Vendor— Affected before 1.17.0 Fixed in 1.17.0 Patch available GHSA-q93q-v844-jrqp

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*before 1.16.4Vulnerablekyverno
  • cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:* Versions before 1.16.4 Vulnerable ·kyverno

Remediation

  • Fix · CNA kyverno (kyverno) Fixed in 1.16.4
  • Fix · GHSA-q93q-v844-jrqp github.com/kyverno/kyverno (Go) Fixed in 1.17.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40868
  2. 2026-10-03 Alias added: GHSA-q93q-v844-jrqp

References

Exploit 1

Advisory 1

Other 1

  • TI-2026-17733 Kyverno Cross-Namespace Privilege Escalation via Policy apiCall CVSS 3.1CRITICAL 10.0
  • TI-2026-29924 Kyverno: ServiceAccount token leaked to external servers via apiCall service URL CVSS 3.1CRITICAL 9.1
  • TI-2025-21189 Kyverno ignores subjectRegExp and IssuerRegExp CVSS 3.1HIGH 8.0
  • TI-2026-30072 Kyverno Controller Denial of Service via forEach Mutation Panic CVSS 3.1HIGH 7.7
  • TI-2026-29707 Kyverno: Cross-Namespace Read Bypasses RBAC Isolation (CVE-2026-22039 Incomplete Fix) CVSS 3.1HIGH 7.7
  • TI-2026-19239 Kyverno Denial of Service via Context Variable Amplification in Policy Engine CVSS 3.1HIGH 7.7
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences