Vulnerability in Hkuds Nanobot
CVE-2026-90809
A vulnerability was identified in HKUDS nanobot up to 0.2.1. The affected element is the function ExecTool._guard_command/ExecTool._spawn of the file nanobot/agent/tools/shell.py of the component ExecTool. Such manipulation leads to argument injection. It is possible to launch the attack remotely. The name of the patch is af582246f141311d574551b7571a517bcc3df750. It is best practice to apply a patch to resolve this issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.006 (46.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Hkuds Nanobot — versions 0.2.0, 0.2.1
Weakness classification (CWE)
References
- vuldb.com/vuln/403311 (technical-description, vdb-entry)
- vuldb.com/vuln/403311/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-90809 (third-party-advisory)
- vuldb.com/submit/922850 (third-party-advisory)
- github.com/HKUDS/nanobot/issues/5306 (issue-tracking)
- github.com/HKUDS/nanobot/pull/5345 (issue-tracking, patch)
- github.com/HKUDS/nanobot/commit/af582246f141311d574551b7571a517bcc3df750 (patch)
- github.com/HKUDS/nanobot/ (product)
Frequently asked questions
- What is CVE-2026-90809?
- CVE-2026-90809 is a high-severity vulnerability in Hkuds Nanobot, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.3/10. Published 2026-09-14.
- How severe is CVE-2026-90809?
- High severity. CVSS v3 base score is 7.3 out of 10.