CVE-2026-90809

6.9 mediumEPSS 0.6%

Medium (6.9). EPSS 0.6% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

6.9 medium

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

7.3 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-31)
CWEs: CWE-74, CWE-88
Published: 2026-09-14
Modified: 2026-09-15
Record from: the NVD, synced 2026-10-19

References

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

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