CVE-2026-16076: Astrbotdevs Astrbot

Medium severity, CVSS 6.3. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Astrbotdevs Astrbot: version 4.25.0 only; version 4.25.1 only; version 4.25.2 only; version 4.25.3 only; version 4.25.4 only; version 4.25.5 only

Published 2026-07-18. Last modified 2026-07-20.