Helm Files.Lines Denial of Service via Empty Chart Files
Helm through 4.2.3, fixed in commit ba6c9a2, contains a denial of service vulnerability in the Files.Lines template helper in pkg/engine/files.go that allows attackers to trigger an index out of range panic by including zero-length byte slices in chart files. Attackers can include empty files in Helm charts to cause deterministic render failures across template, install, upgrade, lint, and SDK Engine.Render operations.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-63308US | medium6.5 | — | ||
Helm through 4.2.3, fixed in commit ba6c9a2, contains a denial of service vulnerability in the Files.Lines template helper in pkg/engine/files.go that allows attackers to trigger a… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/helm/helm/commit/ba6c9a29efa7bf9198dad6a5ec12b4fb30c96017FIX
- https://github.com/helm/helm/issues/32279EVIDENCE
- https://github.com/helm/helm/pull/32290FIX
- https://nvd.nist.gov/vuln/detail/CVE-2026-63308WEB
- https://www.vulncheck.com/advisories/chat2db-insecure-direct-object-reference-via-get-api-connection-datasourceWEB
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