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CVE-2026-90808
HKUDS nanobot ExecTool shell.py ExecTool._spawn incomplete blacklist
Medium5.3EPSS 0.41%
- Published
- Updated
- Reserved
- Assigned by
- VulDB
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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulDBCNA (assigner) | 4.0 | Medium5.3 | 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 |
| VulDBCNA (assigner) | 3.1 | Medium6.3 | 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 |
| VulDBCNA (assigner) | 3.0 | Medium6.3 | 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 |
| VulDBCNA (assigner) | 2.0 | Medium6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:OF/RC:C |
| NVDNVD · Deferred | 4.0 | Medium5.3 | 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.41% · top 65% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
References (8)
- VDB-403310 | HKUDS nanobot ExecTool shell.py ExecTool._spawn incomplete blacklist (opens in a new tab)vdb-entrytechnical-description
- VDB-403310 | CTI Indicators (IOB, IOC, TTP, IOA) (opens in a new tab)signaturepermissions-required
- CVE-2026-90808 | CVE Analysis and Report (opens in a new tab)third-party-advisory
- Submit #922849 | HKUDS nanobot <= 0.2.1 Incomplete List of Disallowed Inputs (CWE-184) (opens in a new tab)third-party-advisory
- https://github.com/HKUDS/nanobot/issues/5305 (opens in a new tab)issue-trackingexploit
- https://github.com/HKUDS/nanobot/pull/5345 (opens in a new tab)issue-trackingpatch
- https://github.com/HKUDS/nanobot/commit/af582246f141311d574551b7571a517bcc3df750 (opens in a new tab)patch
- https://github.com/HKUDS/nanobot/ (opens in a new tab)product
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-90808)Record last updated .