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CVE-2026-71963

8.8 · HIGH

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 repositor…

Published Sep 3, 2026CWE-78EPSS 0.86%

Overview

CVE-2026-71963 is a high-severity vulnerability. It was published on September 3, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/NousResearch/hermes-agent/commit/f6234d00c5d59450adea1d7edd30ad3859375c79GitHubgithub.com/NousResearch/hermes-agent/pull/101483Refwww.manifold.security/blog/ai-coding-agents-git-hijackRefwww.vulncheck.com/advisories/hermes-agent-rce-via-git-core-fsmonitor-config-injection

How CyberStrike helps

Frequently asked questions

What is CVE-2026-71963?

CVE-2026-71963 is a high-severity vulnerability. It was published on September 3, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-71963?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-71963?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-71963?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-71963 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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