Snyk sweater-comb up to 3.8.7 Command Execution src/lint.ts expectGitBranch optic-ci.original os command injection

Summaryinfo

A vulnerability categorized as critical has been discovered in Snyk sweater-comb up to 3.8.7. This vulnerability affects the function expectGitBranch of the file src/lint.ts of the component Command Execution. The manipulation of the argument optic-ci.original results in os command injection. This vulnerability is cataloged as CVE-2026-75486. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Snyk sweater-comb up to 3.8.7. Affected is the function expectGitBranch of the file src/lint.ts of the component Command Execution. The manipulation of the argument optic-ci.original with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Synk Sweater Comb before 3.8.8 contains a command injection vulnerability that allows an attacker who controls the .vervet.yaml configuration file to execute arbitrary OS commands by injecting malicious input into the linters.<key>.optic-ci.original branch name field. The expectGitBranch() function in src/lint.ts passes the unsanitized branch name directly into child_process.exec() via an unescaped template literal, enabling arbitrary command execution when the lint command is run against the repository.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-75486 since 08/17/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 3.8.8 eliminates this vulnerability.

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Productinfo

Vendor

• Snyk

Name

• sweater-comb

Version

• 3.8.0
• 3.8.1
• 3.8.2
• 3.8.3
• 3.8.4
• 3.8.5
• 3.8.6
• 3.8.7

Website

• Product: https://github.com/snyk/sweater-comb/

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