Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV N L N L N N N L 2.1 .0047 38.5 —
AFFECTED Product Versions Fixed hermes-agent 0.18.0 – —
TIMELINE Sep 1 Reserved by VulDB Sep 1 Published (CNA: VulDB) Sep 2 EXPLOIT PUBLISHED — CVE-2026-84289 (NousResearch hermes-agent). Public exploit reference added.
A vulnerability was found in NousResearch hermes-agent up to 0.18.2. This vulnerability affects the function list_tools of the file tools/mcp_tool.py of the component MCP Tool. Performing a manipulation results in uncontrolled memory allocation. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
| Date | Event | Detail |
|---|---|---|
| September 1, 2026 | Reserved | Reserved by VulDB |
| September 1, 2026 | Published | Published (CNA: VulDB) |
| September 2, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-84289 (NousResearch hermes-agent). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| NousResearch | hermes-agent | — | 0.18.0 | — |
Authoritative record: CVE-2026-84289 at cve.org
Vendors: nousresearch
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-84289 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
