Vulnerability Description
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 Score
LOW
Related Weaknesses (CWE)
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
FAQ
What is CVE-2026-15311?
CVE-2026-15311 is a vulnerability with a CVSS score of 3.5 (LOW). 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 com...
How severe is CVE-2026-15311?
CVE-2026-15311 has been rated LOW with a CVSS base score of 3.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-15311?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.