Read the docs
TI-2026-85291 Aliases CVE-2026-122313GHSA-8qwp-w9x6-mcp7

Privilege escalation in Kyverno lets tenants mutate other namespaces

Priority MEDIUM 40CWE-269Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-269.

Summary

Kyverno from 1.17.0 before 1.19.2 lets namespace-scoped tenants modify resources in other namespaces through NamespacedMutatingPolicy (CWE-269). The targetMatchConstraints.expression CEL output lacks namespace checks, so a low-privileged tenant can name another tenant's RoleBinding as a literal target. The cluster-wide background controller then mutates that resource to add attacker subjects or to alter Roles, NetworkPolicies, and ConfigMaps.

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

Description from the CNA

Kyverno from 1.17.0 before 1.19.2 contains a privilege escalation vulnerability that allows namespace-scoped tenants to modify resources in other namespaces through NamespacedMutatingPolicy targetMatchConstraints.expression CEL output lacking namespace checks. Attackers can emit a literal target such as another tenant's RoleBinding, which the cluster-wide background controller then mutates to add attacker subjects or alter Roles, NetworkPolicies, and ConfigMaps.

Why it matters now

EPSS 0.00311 24th 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
kyvernokyverno1.17.0 to before 1.19.21.19.2Patch availableCNA
  • kyverno Vendorkyverno Affected 1.17.0 to before 1.19.2 Fixed in 1.19.2 Patch available CNA

Remediation

Upgrade Kyverno to version 1.19.2, 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-2026-85288 Kyverno 1.19.1 before 1.19.2 Privilege Escalation via Policy apiCall urlPathPriority MEDIUM 40
    Show all 21 records →

Timeline

  1. 2026-11-05 Threatist record created from CVE-2026-122313
  2. 2026-11-05 Alias added: GHSA-8qwp-w9x6-mcp7

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