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CVE-2026-71963

8.8, high

NousResearch hermes-agent OS Command Injection Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.8, high high CVSS v3.1
EPSS, next 30 days
0.9% higher than 57.6% of scored CVEs
Exploitation
No public evidence
Published
3 Sept 2026a month ago

Description

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.

Details

Vendor
NousResearch
Product
hermes-agent
Weakness
CWE-78 (opens in a new tab)
Status
Deferred
Updated
8 Sept 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References 4

Patches and fixes 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other NousResearch CVEs

Every NousResearch CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-85105 A flaw has been found in NousResearch hermes-agent 0.18.0 EPSS 0.5% 7.3, high

Beyond this page

Is CVE-2026-71963 in your network?

This page tells you how dangerous CVE-2026-71963 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.