NousResearch hermes-agent up to 2026.4.16 read_file Tool tools/file_tools.py _is_blocked_device path traversal

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in NousResearch hermes-agent up to 2026.4.16. This issue affects the function _is_blocked_device of the file tools/file_tools.py of the component read_file Tool. Executing a manipulation can lead to path traversal. The identification of this vulnerability is CVE-2026-9351. The attack may be launched remotely. Furthermore, there is an exploit available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability has been found in NousResearch hermes-agent up to 2026.4.16 and classified as critical. This vulnerability affects the function _is_blocked_device of the file tools/file_tools.py of the component read_file Tool. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect integrity, and availability.

The advisory is available at gist.github.com. This vulnerability was named CVE-2026-9351. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

It is possible to download the exploit at gist.github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.5
VulDB Temp Score: 5.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/23/2026 Advisory disclosed
05/23/2026 +0 days VulDB entry created
05/23/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: gist.github.com
Status: Not defined

CVE: CVE-2026-9351 (🔒)
GCVE (CVE): GCVE-0-2026-9351
GCVE (VulDB): GCVE-100-365314
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/23/2026 11:24
Changes: 05/23/2026 11:24 (57)
Complete: 🔍
Submitter: Eric-h
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #812214: NousResearch hermes-agent 2026.4.16 Path Traversal (CWE-22) (by Eric-h)

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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