CVE-2026-9354
Last modified
CVE-2026-9354 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.34% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
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
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-9354?
How severe is CVE-2026-9354?
How do I fix CVE-2026-9354?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-9348A vulnerability was found in Edimax EW-7438RPn up to 1.31. A…8.8
- CVE-2026-9349A vulnerability was determined in calcom cal.diy up to 4.9.4…5.5
- CVE-2026-9350A vulnerability was identified in NousResearch hermes-agent …7.3
- CVE-2026-9351A security flaw has been discovered in NousResearch hermes-a…6.5
- CVE-2026-9352A weakness has been identified in NousResearch hermes-agent …5.5
- CVE-2026-9353A security vulnerability has been detected in NousResearch h…7.3
- CVE-2026-9355A flaw has been found in SourceCodester Hospitals Patient Re…7.3
- CVE-2026-9356A vulnerability has been found in SourceCodester Hospitals P…7.3
- CVE-2026-9357A vulnerability was found in vBulletin 6.x. This impacts an …3.5
- CVE-2026-9358A vulnerability was determined in postcss-selector-parser up…4.3
- CVE-2026-9359A vulnerability was identified in Edimax EW-7438RPn 1.28a. A…6.3
- CVE-2026-9360A security flaw has been discovered in Edimax EW-7438RPn 1.2…8.8
Are you affected by CVE-2026-9354?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST