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CVE-2026-90809

HKUDS nanobot ExecTool shell.py ExecTool._spawn argument injection

HIGH
7.3
CVSS Score
Published: September 14, 2026 at 06:15 PM UTC
Updated: September 15, 2026 at 02:17 PM UTC
2 products affected across 2 vendorsNanobotNanobot

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Severity
HIGH7.3
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (8)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/403311
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/403311/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-90809
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/922850
Issue Tracking
Source: cverecord
https://github.com/HKUDS/nanobot/issues/5306
Issue TrackingPatch
Source: cverecord
https://github.com/HKUDS/nanobot/pull/5345
Patch
Source: cverecord
https://github.com/HKUDS/nanobot/commit/af582246f141311d574551b7571a517bcc3df750
Product
Source: cverecord
https://github.com/HKUDS/nanobot/

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-88CWE-74

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