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CVE-2026-63308

Helm Files.Lines Denial of Service via Empty Chart Files

Published: Jul 17, 2026Updated: Jul 30, 2026 Sources: CVE List NVDCWE-129
4.3MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 80.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-129

Affected Products

helm
oss-project
helmMixed
DevTools & CI / artifact-registry

Exploitability

Official Patch Available
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References

https://github.com/helm/helm/issues/32279
github.com
https://github.com/helm/helm/pull/32290
github.com
https://github.com/helm/helm/commit/ba6c9a29efa7bf9198dad6a5ec12b4fb30c96017
github.com
and 1 more references View all →

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