Vulnerability in Nousresearch Hermes-Agent
CVE-2026-10222
A security flaw has been discovered in NousResearch hermes-agent up to 2026.4.30. Affected by this issue is the function _sanitize_env_lines of the file hermes_cli/config.py. The manipulation results in injection. It is possible to launch the attack remotely. The attack requires a high level of complexity. The exploitation is known to be difficult. The exploit has been released to the public and may be used for attacks. 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 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (16.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.9% 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 2026.4.0, 2026.4.1, 2026.4.2
Weakness classification (CWE)
References
- vuldb.com/vuln/367501 (technical-description, vdb-entry)
- vuldb.com/vuln/367501/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-10222 (third-party-advisory)
- vuldb.com/submit/822020 (third-party-advisory)
- gist.github.com/YLChen-007/7ee2eeaa383b3540d2e8854250c03fb0 (exploit)
Frequently asked questions
- What is CVE-2026-10222?
- CVE-2026-10222 is a medium-severity vulnerability in Nousresearch Hermes-Agent, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 5.6/10. Published 2026-06-01.
- How severe is CVE-2026-10222?
- Medium severity. CVSS v3 base score is 5.6 out of 10.