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Vulnerability record · CVE-2026-75486 · published 28 August 2026

CVE-2026-75486: OS command injection vulnerability

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.

8.5 CVSS 4.0 High EPSS 2.3% · top 17.3% CWE-78 · OS command injection Deferred
8.5CVSS 4.0 base score
2.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
8 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/snyk/sweater-comb/commit/05a0eec4f2acb9ce6d4814016b475504fc64eab2
https://github.com/snyk/sweater-comb/pull/743
https://github.com/snyk/sweater-comb/releases/tag/v3.8.8
https://www.vulncheck.com/advisories/synk-sweater-comb-command-injection-via-vervet-yaml-branch-name
https://github.com/snyk/sweater-comb/pull/743

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Source: NIST National Vulnerability Database (record CVE-2026-75486), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.