Auth bypass in Nousresearch Hermes-Agent
CVE-2026-18773
A vulnerability was detected in NousResearch hermes-agent up to 2026.6.5. Affected by this issue is the function _check_slash_access of the file gateway/run.py of the component Quick Command Handler. The manipulation results in incorrect authorization. The attack can be launched 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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (28.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Nousresearch Hermes-Agent — versions 2026.6.0, 2026.6.1, 2026.6.2
Weakness classification (CWE)
References
- vuldb.com/vuln/385783 (technical-description, vdb-entry)
- vuldb.com/vuln/385783/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-18773 (third-party-advisory)
- vuldb.com/submit/856874 (third-party-advisory)
- gist.github.com/YLChen-007/f0036aa1c410b70f5e41272947180645 (exploit)
Frequently asked questions
- What is CVE-2026-18773?
- CVE-2026-18773 is a medium-severity vulnerability in Nousresearch Hermes-Agent, classified under Improper Authorization. CVSS score: 6.3/10. Published 2026-08-04.
- How severe is CVE-2026-18773?
- Medium severity. CVSS v3 base score is 6.3 out of 10.