CVE-2026-71963Public exploitNetwork attack vectorHinoki check available

Code execution via unsanitized git config

Published Sep 3, 2026 · Updated Sep 3, 2026

OS command injection in Nous Research Hermes Agent 0.18.2 through 0.21.0 allows attackers to execute commands from a malicious repository. Automatic git status probes in agent/coding_context.py::_git and tui_gateway.git_probe pass .git/config through unchanged, so an index refresh invokes its core.fsmonitor command. A user must open a repository delivered with its .git directory intact and send a message; execution occurs as that user and can expose provider API keys.

CVSS severity8.8
High
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OS command injection in Nous Research Hermes Agent 0.18.2 through 0.21.0 allows attackers to execute commands from a malicious repository. Automatic git status probes in agent/coding_context.py::_git and tui_gateway.git_probe pass .git/config through unchanged, so an index refresh invokes its core.fsmonitor command. A user must open a repository delivered with its .git directory intact and send a message; execution occurs as that user and can expose provider API keys.

The record

CVE
CVE-2026-71963
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
Nous Research
Product
Hermes Agent
Classifications
CWE-78, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.18.2 <=0.21.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nous Research · Hermes Agentversion=0.18.2 <=0.21.0

Published CVSS scores

8.6VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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