# CVE-2026-122319: Kyverno denial-of-service in In and NotIn operators

Source: https://junglewise.ai/threats/cve-2026-122319-kyverno-before-1-19-2-contains-a-denial-of-service-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-05. Updated: 2026-11-05  
License: CC BY 4.0 with a link back

CVE-2026-122319 · Severity: high · CVSS 7.5 · Published 2026-11-05

Kyverno is a policy engine for Kubernetes that controls which resources can be created and modified in a cluster. A flaw in its In and NotIn policy operators allows attackers to crash the policy engine by submitting specially crafted resources, causing admission control to fail and potentially disrupting cluster operations.

Technologies: [Kyverno](https://junglewise.ai/threats/technologies/kyverno). Vendors: [Kyverno](https://junglewise.ai/threats/vendors/kyverno).

## Quick answers

**Is CVE-2026-122319 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-122319 being exploited in the wild.

**How severe is CVE-2026-122319?** High severity, with a CVSS score of 7.5, published 5 November 2026.

**Which products and versions are affected?** Kyverno before 1.19.2.

**Is there a fix for CVE-2026-122319?** Yes: fixed in 1.19.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-122319 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-122319?** Check whether you run Kyverno at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 1.19.2

## Technical details

The In and NotIn operators in Kyverno perform an unchecked type assertion on JMESPath-evaluated arrays, assuming all elements are strings. When JMESPath returns arrays containing integers, booleans, or mixed types (decoded as []interface{}), the assertion panics. An attacker with permission to submit resources can trigger this panic during policy evaluation, causing the admission controller to crash.

## Affected products

- Kyverno Kyverno before 1.19.2

## Timeline

- 2026-10-21: disclosed
- 2026-11-05: advisory

## References

- [https://github.com/kyverno/kyverno/security/advisories/GHSA-r2p2-3892-5jjf](https://github.com/kyverno/kyverno/security/advisories/GHSA-r2p2-3892-5jjf)
- [https://www.vulncheck.com/advisories/kyverno-before-1.19.2-denial-of-service-via-in-notin-operator-panic](https://www.vulncheck.com/advisories/kyverno-before-1.19.2-denial-of-service-via-in-notin-operator-panic)

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- [Kyverno authorization bypass in generate rule validation](https://junglewise.ai/threats/cve-2026-124441-kyverno-before-1-19-2-contains-an-authorization-bypass)
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