Vulnerability · Published May 24, 2026 · Assigned by VulDB

CVE-2026-9351NousResearch hermes-agent read_file Tool file_tools.py _is_blocked_device path traversal

Medium 6.5

In plain English

A medium-severity path traversal in hermes-agent from NousResearch. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.7%top 47.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
NousResearch	hermes-agent	2026.4.02026.4.12026.4.22026.4.32026.4.42026.4.52026.4.62026.4.7

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R

References

VDB-365314 | NousResearch hermes-agent read_file Tool file_tools.py _is_blocked_device path traversal vdb-entry, technical-description
VDB-365314 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #812214 | NousResearch hermes-agent 2026.4.16 Path Traversal (CWE-22) third-party-advisory
https://gist.github.com/YLChen-007/1d1aeff404cb88e06ec2fb3377f49fef exploit