Is CVE-2026-9354 actively exploited?

No active exploitation of CVE-2026-9354 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-9354 be exploited remotely?

Yes. CVE-2026-9354 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-9354?

CVE-2026-9354 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2026-9354

CWE-74Published: May 24, 2026· Updated: May 26, 2026

6.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.5th

Official 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.

NVD Source

Technical Analysis

CVE-2026-9354 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.