What is CVE-2026-71963?

CVE-2026-71963 is a high-severity vulnerability, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-09-03.

How severe is CVE-2026-71963?

High severity. CVSS v3 base score is 8.8 out of 10.

CVE-2026-71963

CVE-2026-71963

Hermes Agent 0.18.2 through 0.21.0, fixed in commit f6234d0, contains a remote code execution vulnerability that allows attackers to execute arbitrary OS commands by supplying a malicious repository with a crafted .git/config that sets core.fsmonitor to an attacker-controlled command. When a user opens the malicious repository and sends any message, the agent triggers a git status index refresh which executes the injected command in the user's process context, exposing the full environment including configured provider API keys.

Vulnerability class: Command Injection (OS Command Injection)

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

Frequently asked questions

What is CVE-2026-71963?: CVE-2026-71963 is a high-severity vulnerability, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-09-03.
How severe is CVE-2026-71963?: High severity. CVSS v3 base score is 8.8 out of 10.