CVE-2026-15311

lowCVSS 3.5covered by 1 sourcefirst seen 2026-07-10

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.

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Exploitation outlook

Low exploitation risk0.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all EPSS-scored CVEs.

Advisory coverage (1)

lowCVE-2026-15311: A vulnerability was identified in NousResearch hermes-agent up to 2026.5.29.2. Affected by thi…nvd · 2026-07-10

External references

NVD record for CVE-2026-15311

CVE.org record

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