CVE-2026-90809CWE-74CWE-88

CVE-2026-90809

High · published September 14, 2026

CVSS v3.1
7.3
EPSS
1%
Percentile
45.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
EPSS
0.00559 · 45.8th percentile
Weaknesses
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'); CWE-88 · Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Published
2026-09-14T23:18Z
References (8)
https://github.com/HKUDS/nanobot/ · [email protected]https://github.com/HKUDS/nanobot/commit/af582246f141311d574551b7571a517bcc3df750 · [email protected]https://github.com/HKUDS/nanobot/issues/5306 · [email protected]https://github.com/HKUDS/nanobot/pull/5345 · [email protected]https://vuldb.com/cve/CVE-2026-90809 · [email protected]https://vuldb.com/submit/922850 · [email protected]https://vuldb.com/vuln/403311 · [email protected]https://vuldb.com/vuln/403311/cti · [email protected]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 14 SEP 18:15Z
    HKUDS nanobot ExecTool shell.py ExecTool._spawn argument injection
    cvelistv5