Helm up to 4.2.3 Files Lines Helper pkg/engine/files.go denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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2.8$0-$5k2.22

Summaryinfo

A vulnerability was found in Helm up to 4.2.3. It has been classified as problematic. This issue affects some unknown processing of the file pkg/engine/files.go of the component Files Lines Helper. This manipulation causes denial of service. This vulnerability is tracked as CVE-2026-63308. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability has been found in Helm up to 4.2.3 and classified as problematic. Affected by this vulnerability is an unknown code block of the file pkg/engine/files.go of the component Files Lines Helper. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-63308 since 07/16/2026. The exploitation appears to be easy. Attacking locally is a requirement. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.8
VulDB Meta Temp Score: 2.8

VulDB Base Score: 2.8
VulDB Temp Score: 2.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/16/2026 CVE reserved
07/17/2026 +1 days Advisory disclosed
07/17/2026 +0 days VulDB entry created
07/17/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Not defined

CVE: CVE-2026-63308 (🔒)
GCVE (CVE): GCVE-0-2026-63308
GCVE (VulDB): GCVE-100-379867

Entryinfo

Created: 07/17/2026 18:51
Changes: 07/17/2026 18:51 (52)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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