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CVE-2026-9354

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CVE-2026-9354

Published: May 24, 2026

Modified: May 27, 2026

PUBLISHED

CVSS v3.1

6.5

MEDIUM

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.

VendorProductVersions

NousResearch

hermes-agent

affected
2026.4.0
affected
2026.4.1
affected
2026.4.2
affected
2026.4.3
affected
2026.4.4

+12 more versions

Weaknesses (CWE)

CWE-116
CWE-74

CVSS v3.1 Details

CVSS v3.1 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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

References

VDB-365317 | CTI Indicators (IOB, IOC, IOA)
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