CVE-2026-90808 (CVSS 6.3)

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.

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CVSS v3.1 Score

6.3

MEDIUM

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

EPSS — Exploit Prediction

0.0029

Probability of exploitation

0.21%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-183 CWE-183

CWE-184 CWE-184

References

Other References

https://github.com/HKUDS/nanobot/ https://github.com/HKUDS/nanobot/commit/af582246f141311d574551b7571a517bcc3df750 https://github.com/HKUDS/nanobot/issues/5305 https://github.com/HKUDS/nanobot/pull/5345 https://vuldb.com/cve/CVE-2026-90808 https://vuldb.com/submit/922849 https://vuldb.com/vuln/403310 https://vuldb.com/vuln/403310/cti https://github.com/HKUDS/nanobot/issues/5305

Frequently Asked Questions

What is CVE-2026-90808? +

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. It has a CVSS v3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2026-90808? +

CVE-2026-90808 has a CVSS v3.1 score of 6.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0029, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-90808? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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