Vulnerability · Published Aug 28, 2026 · Assigned by VulnCheck

CVE-2026-75486Synk Sweater Comb < 3.8.8 Command Injection via .vervet.yaml Branch Name

High 8.0

In plain English

A high-severity OS command injection in sweater-comb from snyk. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 83% of all known vulnerabilities).

Severity (CVSS 3.1)8.0High

Exploit odds (30 days)2.3%top 16.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
snyk	sweater-comb	0 – before 3.8.8

Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

References

Sweater Comb v3.8.8 Release Notes release-notes
Pull Request issue-tracking, patch
Patch Commit patch
https://www.vulncheck.com/advisories/synk-sweater-comb-command-injection-via-vervet-yaml-branch-name third-party-advisory