SB2026100127 - Multiple vulnerabilities in Simple Git

Description

This security bulletin contains information about 2 vulnerabilities.

1) Command injection (CVE-ID: CVE-2026-102827)

CWE-ID: CWE-77 - Command injection

CVSSv4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to execute arbitrary commands.

The vulnerability exists due to improper neutralization of special elements in a command in the blockUnsafeOperationsPlugin when processing attacker-influenced git push options. A remote attacker can supply an abbreviated --receive-pack or --exec option to execute arbitrary commands.

Exploitation can occur with a local or file remote, or with an attacker-influenced receive-pack target.

2) OS Command Injection (CVE-ID: CVE-2026-102826)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to improper neutralization of OS command elements in the blockUnsafeOperationsPlugin configuration-write denylist when processing attacker-influenced custom arguments for git.clone(). A remote attacker can supply a crafted include configuration argument that loads an attacker-controlled git configuration file to execute arbitrary code.

Exploitation requires attacker-writable storage that is readable by the simple-git process.

Remediation

Install update from vendor's website.

References

• https://github.com/steveukx/git-js/security/advisories/GHSA-858h-whjf-mvg5
• https://github.com/steveukx/git-js/security/advisories/GHSA-g4wm-2vf7-vfgr