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TI-2026-85298 Aliases CVE-2026-122321GHSA-2vqq-m4qm-q6m7

Signature verification bypass in Kyverno verifyImages cache

Priority LOW 36CWE-367Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Kyverno from 1.18.0 before 1.19.2 contains a signature verification bypass in verifyImages. Cached verification results are keyed by the image reference string, such as a tag, rather than the verified digest, so cache hits skip signature and attestation checks (CWE-367). An attacker who can submit workloads and move a registry tag can warm the cache with a signed image, repoint the tag, and have Kyverno admit the workload.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

Kyverno 1.18.0 before 1.19.2 contains a signature verification bypass in verifyImages because cached verification results are keyed by the image reference string (such as a tag) rather than bound to the verified digest, so cache hits skip signature and attestation checks. An attacker who can submit workloads and move a registry tag can warm the cache with a signed image, repoint the tag, and have Kyverno admit the workload and use mutateDigest to pin the unverified digest.

Why it matters now

EPSS 0.00227 13th percentileScored 2026-11-07
Fix Fixed kyverno (kyverno): 1.19.2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
kyvernokyverno1.18.0 to before 1.19.21.19.2Patch availableCNA
  • kyverno Vendorkyverno Affected 1.18.0 to before 1.19.2 Fixed in 1.19.2 Patch available CNA

Remediation

Upgrade Kyverno to version 1.19.2 or later, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA kyverno (kyverno) Fixed in 1.19.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    kyverno 1.19.2

    21 records Highest priority Priority MEDIUM 6 MEDIUM, 15 LOW

    Other records, highest priority first

    • TI-2026-85289 Kyverno path traversal in namespaced CEL policies reaches cluster objectsPriority MEDIUM 41
    • TI-2026-85282 Authorization bypass in Kyverno lets namespace admins read SecretsPriority MEDIUM 41
    • TI-2026-85291 Privilege escalation in Kyverno lets tenants mutate other namespacesPriority MEDIUM 40
    Show all 21 records →

Timeline

  1. 2026-11-05 Threatist record created from CVE-2026-122321
  2. 2026-11-05 Alias added: GHSA-2vqq-m4qm-q6m7
  3. 2026-11-06 Priority changed: MEDIUM → LOW

References

Advisory 1

  • TI-2024-32618 Kyverno's PolicyException objects can be created in any namespace by default CVSS 4.0HIGH 8.7
  • TI-2026-57895 Kyverno before v1.13.0 Policy Bypass via Multiple Exceptions CVSS 4.0CRITICAL 9.4
  • TI-2026-39369 Missing authorization in kyverno CVSS 3.1CRITICAL 9.6
  • 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-2026-29524 kyverno apicall servicecall implicit bearer token injection leaks kyverno serviceaccount token CVSS 3.1HIGH 8.1
See all 52 →

Sources

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