Low 3.5Published Jul 10, 2026

CVE-2026-15311A vulnerability was identified in NousResearch hermes-agent up to 2026.5.29.2.

Updated under an hour ago (2026-10-19 09:10 UTC)

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Exploited in the last 30 days

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.

CVSS: 3.5 LOW (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-79, CWE-94
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Deferred
Record last updated: Jul 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

No affected products are listed yet.

References

https://github.com/NousResearch/hermes-agent/
https://github.com/NousResearch/hermes-agent/issues/42667
https://github.com/NousResearch/hermes-agent/pull/42759
https://vuldb.com/cve/CVE-2026-15311
https://vuldb.com/submit/852843
https://vuldb.com/vuln/377247
https://vuldb.com/vuln/377247/cti

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.