CVE-2026-16076 AstrBotDevs AstrBot API open_api.py OpenApiRoute.chat_send authentication spoofing
Attackers can bypass authentication in AstrBot's API by spoofing the Username argument, allowing unauthorized access to chat sending functions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16076?
CVE-2026-16076 is a medium-severity authentication bypass vulnerability in AstrBotDevs AstrBot, published on 18 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-16076?
How do I fix CVE-2026-16076?
No fix has been published for CVE-2026-16076 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-16076 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16076 exists.
Sources
Also known as GHSA-jgf3-cr8w-g5h9.