CVE-2026-90808

HKUDS nanobot ExecTool shell.py ExecTool._spawn incomplete blacklist

State: Published
Severity: 5.3 Medium
Published: Sep 14, 2026
Updated: Sep 14, 2026
Reserved: Sep 13, 2026

Description

A vulnerability was determined in HKUDS nanobot up to 0.2.1. Impacted is the function ExecTool._guard_command/ExecTool._spawn of the file nanobot/agent/tools/shell.py of the component ExecTool. This manipulation causes incomplete blacklist. It is possible to initiate the attack remotely. Patch name: af582246f141311d574551b7571a517bcc3df750. Applying a patch is the recommended action to fix this issue.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X	VulDB
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C	VulDB
3.0	6.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C	VulDB
2.0	6.5 Medium	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:OF/RC:C	VulDB

Weaknesses

CWE-184 Incomplete Blacklist
CWE-183 Permissive List of Allowed Inputs

Affected Products

Product	Versions
nanobotHKUDS	0.2.0Affected 0.2.1Affected

References

VDB-403310 | HKUDS nanobot ExecTool shell.py ExecTool._spawn incomplete blacklistvdb-entrytechnical-description
VDB-403310 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
CVE-2026-90808 | CVE Analysis and Reportthird-party-advisory
Submit #922849 | HKUDS nanobot <= 0.2.1 Incomplete List of Disallowed Inputs (CWE-184)third-party-advisory
https://github.com/HKUDS/nanobot/issues/5305issue-tracking
https://github.com/HKUDS/nanobot/pull/5345issue-trackingpatch
https://github.com/HKUDS/nanobot/commit/af582246f141311d574551b7571a517bcc3df750patch
https://github.com/HKUDS/nanobot/product

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