CRITICALCVSS v3.1 9.9Vulnerability
CVE-2026-122303
Kyverno from 1.17.0 before 1.19.2 contains an authorization bypass vulnerability that allows namespace tenants to overwrite resources in other namespaces via NamespacedMutatingPolicy mutate-existing targetMatchConstraints.expression. Attackers can return a CEL map literal fabricating a target with an attacker-chosen metadata.namespace, causing the privileged background controller to overwrite Secrets, Deployments, or policies cluster-wide.
Properties
- Severity
- CRITICAL
- Nvd fetched at
- 2026-11-05T05:51:13.658545+00:00
- Cvss severity
- CRITICAL
- Cvss score
- 9.9
- Retrieved at
- 2026-11-05T05:52:17+00:00
- Score
- 9.9
- Cvss version
- 3.1
- Last source
- NVD
- Cve id
- CVE-2026-122303
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- First seen by Signal
- 2026-11-05T05:47:49+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Published at
- 2026-11-05T03:17:22.197
- Last modified
- 2026-11-05T03:17:22.197
Related Entities (1)
HAS_WEAKNESS (1)
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