7.3High
CVE-2026-90809
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 this means for your business
- An attacker can use it remotely, over a network, without a login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 0.3% chance of attack attempts being seen in the next 30 days, ranking above 25% of all known flaws.
What to do
- 1Ask your IT team or provider whether any of your systems use the affected product.
- 2If you do, follow the vendor's guidance. No patch reference has been published yet.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 7.3 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L- CVSS v4
- 6.9
- Weakness
- CWE-74
- Assigned by
- cna@vuldb.com
Dates
- Published
- 2026-09-14
- Last modified
- 2026-09-15
- Sources
- NVD
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
- https://vuldb.com/submit/922850
- https://vuldb.com/vuln/403311
- https://vuldb.com/vuln/403311/cti