Quick answers
- Is CVE-2026-84287 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-84287 being exploited in the wild.
- How severe is CVE-2026-84287?
- Medium severity, with a CVSS score of 4.3, published 1 September 2026.
- Which products and versions are affected?
- NousResearch Hermes Agent 0.18.0.
- Is there a fix for CVE-2026-84287?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-84287 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-84287?
- Check whether you run NousResearch Hermes Agent at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A denial of service vulnerability exists in hermes-agent 0.18.0 within the Session Chat Interface component, specifically in the gateway/platforms/api_server.py file. The vulnerability is remotely exploitable without authentication. An attacker can leverage this flaw to trigger a denial of service condition, impacting application availability. A public exploit is available, and the vendor did not respond to early disclosure attempts.
Affected products
- NousResearch hermes-agent 0.18.0
Timeline
- 2026-09-01: disclosed