CVE-2026-9354

MEDIUM EPSS 25.5%
Published May 24, 20261mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 4.0
Medium
Find Similar
Published May 24, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

A vulnerability was detected in NousResearch hermes-agent up to 2026.4.16. The affected element is an unknown function of the component Slack Agent/Mattermost Agent. The manipulation of the argument format_message results in escaping of output. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS Details

Base Score
5.5
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
25.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-116
CWE-74

References 4

  • gist.github.com https://gist.github.com/YLChen-007/e90fb38ac03284176bae49898a3a46a4
  • vuldb.com https://vuldb.com/submit/812226
  • vuldb.com https://vuldb.com/vuln/365317
  • vuldb.com https://vuldb.com/vuln/365317/cti

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.