| Component | Nanobot |
| Severity | high (CVSS 7.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| Published (NVD) | 2026-09-14 |
| Last modified | 2026-09-15 |
| Affected versions | <= 0.2.1 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | see the vendor advisory |
| Weakness | CWE-74CWE-88 |
| CISA KEV | not listed |
NVD description
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.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep Nanobot off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-90809
- https://github.com/HKUDS/nanobot/
- https://github.com/HKUDS/nanobot/commit/af582246f141311d574551b7571a517bcc3df750
- https://github.com/HKUDS/nanobot/issues/5306
- https://github.com/HKUDS/nanobot/pull/5345
- https://vuldb.com/cve/CVE-2026-90809
- https://vuldb.com/submit/922850
- https://vuldb.com/vuln/403311
- https://vuldb.com/vuln/403311/cti
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