NousResearch hermes-agent run_agent.py _compress_context injection
Priority HIGH 70CWE-707Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
A vulnerability was identified in NousResearch hermes-agent up to 0.12.0. Affected by this vulnerability is the function _compress_context of the file run_agent.py. The manipulation leads to injection. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00304 23rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NousResearch | hermes-agent | 0.1; 0.2; 0.3; 0.4; 0.5; 0.6; 0.7; 0.8; 0.9; 0.10; 0.11; 0.12.0 | — | No fix listed | CNA |
| — | hermes-agent (PyPI) | up to 0.19.0 | — | No fix listed | GHSA-xq8w-9jvx-gm3v |
- hermes-agent VendorNousResearch Affected 0.1; 0.2; 0.3; 0.4; 0.5; 0.6; 0.7; 0.8; 0.9; 0.10; 0.11; 0.12.0 Fixed in — No fix listed CNA
- hermes-agent (PyPI) Vendor— Affected up to 0.19.0 Fixed in — No fix listed GHSA-xq8w-9jvx-gm3v
CPE names CNA · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nousresearch:hermes-agent:*:*:*:*:*:*:*:* | — | — | NousResearch |
- cpe:2.3:a:nousresearch:hermes-agent:*:*:*:*:*:*:*:* Versions — — ·NousResearch
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-10221
- 2026-10-03 Alias added: GHSA-xq8w-9jvx-gm3v
References
More NousResearch vulnerabilities
- TI-2026-50258 Hermes Agent 0.18.2 - 0.21.0 RCE via git core.fsmonitor Config Injection CVSS 4.0HIGH 8.6
- TI-2026-12325 NousResearch hermes-agent Live Webhook Endpoint base.py extract_media path traversal CVSS 4.0MEDIUM 6.9
- TI-2026-08962 NousResearch hermes-agent Webhook Endpoint feishu.py _handle_webhook_request resource consumption CVSS 4.0MEDIUM 6.9
- TI-2026-08958 NousResearch hermes-agent skills_tool.py skill_view injection CVSS 4.0MEDIUM 6.9
- TI-2026-08218 NousResearch hermes-agent Environment Variable code_execution_tool.py execute_code sandbox CVSS 4.0MEDIUM 6.9
- TI-2026-08217 NousResearch hermes-agent terminal_tool approval.py detect_dangerous_command os command injection CVSS 4.0MEDIUM 6.9
Sources
- CVE-2026-10221 · CVE Program
- CVE-2026-10221 · NVD
- FIRST EPSS
- GHSA-xq8w-9jvx-gm3v · GitHub Advisory Database · CC BY 4.0
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