What is CVE-2026-5917?

CVE-2026-5917 is a critical-severity vulnerability in Libgit2, classified under OS Command Injection. CVSS score: 9.6/10. Published 2026-08-11.

How severe is CVE-2026-5917?

Critical severity. CVSS v3 base score is 9.6 out of 10.

RCE in Libgit2

CVE-2026-5917

libgit2 versions v0.27.0 through v1.9.0 built with the libssh2 SSH backend (USE_SSH=libssh2) contain a shell command injection vulnerability that allows remote attackers to execute arbitrary commands on an SSH server by supplying a reposit…

Vulnerability class: Command Injection (OS Command Injection)

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Libgit2 — versions 0.27.0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-5917?: CVE-2026-5917 is a critical-severity vulnerability in Libgit2, classified under OS Command Injection. CVSS score: 9.6/10. Published 2026-08-11.
How severe is CVE-2026-5917?: Critical severity. CVSS v3 base score is 9.6 out of 10.