CVE-2026-75486

high

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.

References

https://www.vulncheck.com/advisories/synk-sweater-comb-command-injection-via-vervet-yaml-branch-name

https://github.com/snyk/sweater-comb/releases/tag/v3.8.8

https://github.com/snyk/sweater-comb/pull/743

https://github.com/snyk/sweater-comb/commit/05a0eec4f2acb9ce6d4814016b475504fc64eab2

Details

Source: Mitre, NVD

Published: 2026-08-28

Updated: 2026-08-31

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 8.5

Vector: 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

Severity: High

EPSS

EPSS: 0.01251