EUVD-2026-67789
GHSA-rcgj-xg9w-8x5p
Severity by source
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:X/V:X/RE:X/U:X
Network vector reflects the malicious-PR exploitation path; PR:L for required contributor access; UI:R because the lint command must be actively invoked by a victim or pipeline.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
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:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Command injection in Snyk Sweater Comb before version 3.8.8 allows an attacker who controls the .vervet.yaml configuration file to execute arbitrary OS commands on the host running the lint operation. The root cause is the expectGitBranch() function in src/lint.ts passing the unsanitized linters.<key>.optic-ci.original branch name value directly into Node.js child_process.exec() via an unescaped template literal, where the shell interpreter evaluates injected metacharacters as commands. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to control the content of the linters.<key>.optic-ci.original field within the .vervet.yaml configuration file in the target repository. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.5 reflects high impact across confidentiality, integrity, and availability on the vulnerable system, with low privileges required and active user interaction as a prerequisite. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Snyk Sweater Comb to version 3.8.8 or later, released 2026-08-27, which resolves this vulnerability per the GitHub release at https://github.com/snyk/sweater-comb/releases/tag/v3.8.8 and fix commit https://github.com/snyk/sweater-comb/commit/05a0eec4f2acb9ce6d4814016b475504bc64eab2. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems using Snyk Sweater Comb and identify affected versions (prior to 3.8.8). …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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