Path Traversal in Nousresearch Hermes-Agent
CVE-2026-9351
A security flaw has been discovered in NousResearch hermes-agent up to 2026.4.16. This vulnerability affects the function _is_blocked_device of the file tools/file_tools.py of the component read_file Tool. Performing a manipulation results in path traversal. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.008 (55.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.001
Affected products
- Nousresearch Hermes-Agent — versions 2026.4.0, 2026.4.1, 2026.4.2
Weakness classification (CWE)
References
- vuldb.com/vuln/365314 (technical-description, vdb-entry)
- vuldb.com/vuln/365314/cti (signature, permissions-required)
- vuldb.com/submit/812214 (third-party-advisory)
- gist.github.com/YLChen-007/1d1aeff404cb88e06ec2fb3377f49fef (exploit)
Frequently asked questions
- What is CVE-2026-9351?
- CVE-2026-9351 is a medium-severity vulnerability in Nousresearch Hermes-Agent, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-05-24.
- How severe is CVE-2026-9351?
- Medium severity. CVSS v3 base score is 6.5 out of 10.