CVE-2026-90808CWE-183CWE-184

CVE-2026-90808

Medium · published September 14, 2026

CVSS v3.1
6.3
EPSS
0%
Percentile
33.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
5.3 · 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
EPSS
0.00408 · 33.9th percentile
Weaknesses
CWE-183 · Permissive List of Allowed Inputs; CWE-184 · Incomplete List of Disallowed Inputs
Published
2026-09-14T23:18Z
References (9)
https://github.com/HKUDS/nanobot/ · [email protected]https://github.com/HKUDS/nanobot/commit/af582246f141311d574551b7571a517bcc3df750 · [email protected]https://github.com/HKUDS/nanobot/issues/5305 · [email protected]https://github.com/HKUDS/nanobot/pull/5345 · [email protected]https://vuldb.com/cve/CVE-2026-90808 · [email protected]https://vuldb.com/submit/922849 · [email protected]https://vuldb.com/vuln/403310 · [email protected]https://vuldb.com/vuln/403310/cti · [email protected]https://github.com/HKUDS/nanobot/issues/5305 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 14 SEP 18:00Z
    HKUDS nanobot ExecTool shell.py ExecTool._spawn incomplete blacklist
    cvelistv5