CVE-2026-71963CWE-78command-injection

CVE-2026-71963

High · published September 3, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
58.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
8.6 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00858 · 58.0th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-09-03T20:18Z
References (4)
https://github.com/NousResearch/hermes-agent/commit/f6234d00c5d59450adea1d7edd30ad3859375c79 · [email protected]https://github.com/NousResearch/hermes-agent/pull/101483 · [email protected]https://www.manifold.security/blog/ai-coding-agents-git-hijack · [email protected]https://www.vulncheck.com/advisories/hermes-agent-rce-via-git-core-fsmonitor-config-injection · [email protected]
EPSS history
Timeline
  • 05 SEP 03:44Z
    EPSS moved — → 1%
    epss
  • 03 SEP 15:19Z
    Hermes Agent 0.18.2 - 0.21.0 RCE via git core.fsmonitor Config Injection
    cvelistv5