CVE-2026-75486CWE-78command-injection

CVE-2026-75486

High · published August 29, 2026

CVSS v3.1
8.0
EPSS
2%
Percentile
83.3
In the wild
Unconfirmed
What it is

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 record
Technical detail
CVSS v3.1
8.0 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
8.5 · 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
EPSS
0.02315 · 83.3th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-08-29T00:19Z
References (5)
https://github.com/snyk/sweater-comb/commit/05a0eec4f2acb9ce6d4814016b475504fc64eab2 · [email protected]https://github.com/snyk/sweater-comb/pull/743 · [email protected]https://github.com/snyk/sweater-comb/releases/tag/v3.8.8 · [email protected]https://www.vulncheck.com/advisories/synk-sweater-comb-command-injection-via-vervet-yaml-branch-name · [email protected]https://github.com/snyk/sweater-comb/pull/743 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 30 AUG 16:19Z
    EPSS moved — → 1%
    epss
  • 28 AUG 15:47Z
    Synk Sweater Comb < 3.8.8 Command Injection via .vervet.yaml Branch Name
    cvelistv5