Denial of service in Helm
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.
Summary
Helm is a tool for managing Charts. Charts are packages of pre-configured Kubernetes resources. Fuzz testing, provided by the CNCF, identified input to functions in the _strvals_ package that can cause an out of memory panic. The _strvals_ package contains a parser that turns strings in to Go structures. The _strvals_ package converts these strings into structures Go can work with. Some string inputs can cause array data structures to be created causing an out of memory panic. Applications that use the _strvals_ package in the Helm SDK to parse user supplied input can suffer a Denial of Service when that input causes a panic that cannot be recovered from. The Helm Client will panic with input to `--set`, `--set-string`, and other value setting flags that causes an out of memory panic. Helm is not a long running service so the panic will not affect future uses of the Helm client. This issue has been resolved in 3.9.4. SDK users can validate strings supplied by users won't create large arrays causing significant memory usage before passing them to the _strvals_ functions.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| helm | helm | before 3.9.4 | 3.9.4 | Patch available | CNA |
| — | helm.sh/helm/v3 (Go) | before 3.9.4 | 3.9.4 | Patch available | GHSA-7hfp-qfw3-5jxh |
- helm Vendorhelm Affected before 3.9.4 Fixed in 3.9.4 Patch available CNA
- helm.sh/helm/v3 (Go) Vendor— Affected before 3.9.4 Fixed in 3.9.4 Patch available GHSA-7hfp-qfw3-5jxh
Remediation
- Fix · CNA helm (helm) Fixed in 3.9.4
- Fix · GHSA-7hfp-qfw3-5jxh helm.sh/helm/v3 (Go) Fixed in 3.9.4 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| OpenShift Developer Tools and Services | Affected | No fix yet |
| Red Hat Ansible Automation Platform 1.2 | Affected | No fix yet |
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet |
Timeline
- 2026-10-02 Threatist record created from CVE-2022-36055
- 2026-10-03 Alias added: GHSA-7hfp-qfw3-5jxh
References
Advisory 3
More Helm vulnerabilities
- TI-2024-16848 Dependency management path traversal in helm CVSS 3.1MEDIUM 6.4
- TI-2026-45154 Helm Files.Lines Denial of Service via Empty Chart Files CVSS 4.0MEDIUM 5.3
- TI-2023-10627 getHostByName Function Information Disclosure CVSS 3.1MEDIUM 4.3
- TI-2019-15264 An issue was discovered in Cloud Native Computing Foundation (CNCF) Helm through 3.13.3. CVSS 3.1CRITICAL 9.1
- TI-2019-13497 In Helm 2.x before 2.15.2, commands that deal with loading a chart as a directory or… CVSS 3.1CRITICAL 9.8
- TI-2019-16052 Improper certificate validation in helm CVSS 3.0CRITICAL 9.8
Sources
- CVE-2022-36055 · CVE Program
- CVE-2022-36055 · NVD
- FIRST EPSS
- GHSA-7hfp-qfw3-5jxh · GitHub Advisory Database · CC BY 4.0
- CVE-2022-36055 · Red Hat security data · CC BY 4.0
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