GHSA-858h-whjf-mvg5: simple-git (CVE-2026-102827)

Package	Ecosystem	Affected	Fixed in
simple-git	npm	<4.0.0	4.0.0

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

simple-git versions before 4.0.0 let abbreviated spellings of certain git long options, such as receive-pack and exec, bypass the default unsafe-operations protection on push. An attacker who can influence options or arguments passed to a push to a local or file remote can cause arbitrary command execution. Upgrade simple-git to 4.0.0 or later.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.1	High	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0058, the 47th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

5 Oct 2026, 23:47 UTC Confirmed by GitHub Advisory Database
31 Oct 2026, 13:34 UTC First seen by agentprime
31 Oct 2026, 13:34 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.