# Kyverno's NamespacedGeneratingPolicy generator.apply() namespace argument unvalidated -- background controller creates RoleBindings in any namespace including kube-system

Advisory record · `GHSA-79gf-7frw-68m9`

- **Identifiers:** `GHSA-79gf-7frw-68m9` · `BIT-kyverno-2026-54523` · `CVE-2026-54523` · `GO-2026-6296`
- **State:** Confirmed
- **Severity:** CVSS 9.6 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-862](https://cwe.mitre.org/data/definitions/862.html)
- **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md)
- **Published:** 26 Aug 2026
- **Updated:** 2 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 26 Aug 2026, 14:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.6: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `github.com/kyverno/kyverno` (Go): affected `>=1.18.0, <1.18.2`; fixed in `1.18.2`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Kyverno versions >=1.18.0 and <1.18.2 are affected. A user who can create a NamespacedMutatingPolicy in their own namespace can make the admission controller generate resources, such as ConfigMaps, Secrets, NetworkPolicies, or RoleBindings, in any namespace, including kube-system, using the controller's cluster-wide privileges. Upgrade to Kyverno 1.18.2 or later.

Written 6 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 9.6 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0047, the 40th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:48 UTC: First seen by agentprime
- 31 Oct 2026, 14:48 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-79gf-7frw-68m9)

## Sources

- [GitHub Advisory Database: GHSA-79gf-7frw-68m9](https://github.com/advisories/GHSA-79gf-7frw-68m9)
- [OSV: GHSA-79gf-7frw-68m9](https://osv.dev/vulnerability/GHSA-79gf-7frw-68m9)
- <https://github.com/kyverno/kyverno/security/advisories/GHSA-79gf-7frw-68m9>
- <https://github.com/kyverno/kyverno/pull/16238>
- <https://github.com/kyverno/kyverno/commit/0919553c0ea1904f8d891280c92018da97946a06>
- <https://github.com/kyverno/kyverno/commit/5164bcdeda5b57678bc2d7a03ecc2cbb02982dae>
- <https://github.com/kyverno/sdk/commit/6573937441443e1ba5af9fbb28d5c0f20297f9df>
- <https://github.com/kyverno/kyverno>
- <https://github.com/kyverno/kyverno/releases/tag/v1.18.2>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-79gf-7frw-68m9>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-79gf-7frw-68m9/>. Everything for agents: <https://agentprime.io/llms.txt>.