CVE-2022-23526 Helm contains Denial of service through schema file
A null pointer dereference in Helm's chartutil package allows attackers to cause a denial of service via malicious schema files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-23526?
CVE-2022-23526 is a medium-severity vulnerability in helm, published on 15 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Helm is a tool for managing Charts, pre-configured Kubernetes resources. Versions prior to 3.10.3 are subject to NULL Pointer Dereference in the_chartutil_ package that can cause a segmentation violation. The _chartutil_ package contains a parser that loads a JSON Schema validation file. For example, the Helm client when rendering a chart will validate its values with the schema file. The _chartutil_ package parses the schema file and loads it into structures Go can work with. Some schema files can cause array data structures to be created causing a memory violation. Applications that use the _chartutil_ package in the Helm SDK to parse a schema file can suffer a Denial of Service when that input causes a panic that cannot be recovered from. Helm is not a long running service so the panic will not affect future uses of the Helm client. This issue has been patched in 3.10.3. SDK users can validate schema files that are correctly formatted before passing them to the _chartutil_ functions.
Weakness: CWE-476
Which versions are affected by CVE-2022-23526?
4 open source packages ship an affected version, including helm.sh/helm/v3 and helm. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
helm.sh/helm/v3 Go | All versions | 3.10.3 |
helm.sh/helm/v3 Go | All versions | 3.10.3 |
helm.sh/helm/v3 Go | All versions | 3.10.3 |
helm Bitnami | From 3.0.0 | 3.10.3 |
Products include Helm Helm.
How do I fix CVE-2022-23526?
Upgrade helm.sh/helm/v3 to 3.10.3 or later.
Is CVE-2022-23526 being exploited?
There is no known exploitation of CVE-2022-23526 in the wild and no public exploit code.
Other vulnerabilities in helm
- CVE-2019-18658 Helm Unsafe Link Following
- CVE-2019-1010275 Helm Improper Certificate Validation
- CVE-2019-25210 Information disclosure in n/a
- CVE-2025-53547 Helm Chart Dependency Updating With Malicious Chart.yaml Content And Symlink Can Lead To Code Execution
- CVE-2020-11013 lookup Function Information Discolosure in Helm
Sources
Also known as AZL-11656, BIT-helm-2022-23526, CLEANSTART-2026-DR45541, GHSA-67fx-wx78-jx33, GO-2022-1166.