PT-2026-57019 · Nousresearch · Hermes-Agent

Eric-D · Published 2026-07-09 · Updated 2026-07-10 · CVE-2026-15311

Mitre

CVSS v3.1

3.5

Low

Base vector

AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

A vulnerability was identified in NousResearch hermes-agent up to 2026.5.29.2. Affected by this issue is the function MatrixAdapter. markdown to html of the file gateway/platforms/matrix.py of the component Matrix Adapter. Such manipulation leads to cross site scripting. The attack can be executed remotely. The exploit is publicly available and might be used. The pull request to fix this issue awaits acceptance.

Exploit

Fix

XSS

Code Injection

Weakness Enumeration

CWE-79

CWE-94

Related Identifiers

CVE-2026-15311

Affected Products

Hermes-Agent

References · 8

• 🔥 https://github.com/NousResearch/hermes-agent/issues/42667 · Exploit
• https://github.com/NousResearch/hermes-agent/pull/42759 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-15311 · Security Note
• https://vuldb.com/vuln/377247/cti · Note
• https://vuldb.com/cve/CVE-2026-15311 · Note
• https://vuldb.com/vuln/377247 · Note
• https://vuldb.com/submit/852843 · Note
• https://github.com/NousResearch/hermes-agent · Note