Auth bypass in Astrbotdevs Astrbot
CVE-2026-16076
A vulnerability has been found in AstrBotDevs AstrBot up to 4.25.5. This issue affects the function OpenApiRoute.chat_send of the file astrbot/dashboard/routes/open_api.py of the component API. Such manipulation of the argument Username leads to authentication bypass by spoofing. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Broken Authentication
EPSS: 0.005 (41.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Astrbotdevs Astrbot — versions 4.25.0, 4.25.1, 4.25.2
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (exploit)
Frequently asked questions
- What is CVE-2026-16076?
- CVE-2026-16076 is a medium-severity vulnerability in Astrbotdevs Astrbot, classified under Improper Authentication. CVSS score: 6.3/10. Published 2026-07-18.
- How severe is CVE-2026-16076?
- Medium severity. CVSS v3 base score is 6.3 out of 10.