RCE in Snyk Sweater-Comb
CVE-2026-75486
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.023 (83.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.023 · change: +0.011
Affected products
Weakness classification (CWE)
References
- github.com/snyk/sweater-comb/releases/tag/v3.8.8 (release-notes)
- github.com/snyk/sweater-comb/pull/743 (issue-tracking, patch)
- github.com/snyk/sweater-comb/commit/05a0eec4f2acb9ce6d4814016b475504fc64eab2 (patch)
- www.vulncheck.com/advisories/synk-sweater-comb-command-injection-via-vervet-yam… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75486?
- CVE-2026-75486 is a high-severity vulnerability in Snyk Sweater-Comb, classified under OS Command Injection. CVSS score: 8.0/10. Published 2026-08-28.
- How severe is CVE-2026-75486?
- High severity. CVSS v3 base score is 8.0 out of 10.