Quick answers
- Is CVE-2026-122305 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-122305 being exploited in the wild.
- How severe is CVE-2026-122305?
- High severity, with a CVSS score of 7.7, published 5 November 2026.
- Which products and versions are affected?
- Kyverno before 1.19.2.
- Is there a fix for CVE-2026-122305?
- 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-2026-122305 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-122305?
- 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 substituteVariablesIfAny function in pkg/engine/variables/vars.go contains an unbounded loop that re-scans substituted values for nested template patterns without an iteration or depth limit. When an attacker-controlled annotation value re-introduces the same variable template (e.g., annotation x contains the pattern {{request.object.metadata.annotations.x}}), the loop never terminates, causing unbounded memory growth and CPU exhaustion. An authenticated user with resource creation permissions in a namespace matched by a vulnerable policy can trigger this condition.
Affected products
- Kyverno Kyverno before 1.19.2
Timeline
- 2026-10-21: disclosed
- 2026-11-05: advisory