CVE-2026-16076
MediumCVSS 6.3Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
A vulnerability in AstrBot up to version 4.25.5 affects the OpenApiRoute.chat_send function in open_api.py. Manipulating the Username argument in the API allows authentication bypass via spoofing. The attack can be launched remotely and exploit details are publicly available.
Risk Assessment
The risk involves remote authentication bypass and impersonation of any user, potentially leading to unauthorized access to API functions and possible takeover of the bot.
Recommendation
Immediately update AstrBot to the latest available version that fixes this vulnerability. Until then, restrict API access to trusted IP addresses and implement additional authentication mechanisms.
Other vulnerabilities in AstrBot
See all- CVE-2025-55449High
AstrBot 3.5.15 contains a hardcoded private key 'Advanced_System_for_Text_Response_and_Bot_Operations_Tool' used to sign JWT.
- CVE-2026-17530Medium
A security flaw in AstrBotDevs AstrBot up to 4.25.5 involves incorrect authorization in the function _build_handoff_toolset of the Subagent component. The attack can be launched remotely. Exploit is publicly available.
- CVE-2026-17529Medium
A vulnerability in AstrBotDevs AstrBot up to 4.25.5 involves incorrect authorization in an unknown function of astrbot/core/astr_main_agent.py via manipulation of the req.func_tool argument. The attack can be launched remotely. Exploit is publicly available.
- CVE-2026-16077Medium
A vulnerability was found in AstrBot up to version 4.25.5 in the _normalize_rw_path function of the fs.py file in the Filesystem Computer-Use Tool component. The flaw allows link following with local access. The exploit is public and the vendor did not respond.
- CVE-2026-16075Medium
A flaw in AstrBot up to version 4.25.5 affects the OpenApiRoute.get_chat_sessions function in astrbot/dashboard/routes/open_api.py. Manipulation of the Username argument in the session-listing endpoint leads to authorization bypass. The attack is remotely exploitable and a public exploit exists.
- CVE-2026-16074Medium
A server-side request forgery (SSRF) vulnerability was found in AstrBot up to version 4.25.2 in the plugin update handler component. An attacker can remotely manipulate the download_url, download_urls, or proxy arguments to send requests to internal network resources. The exploit is publicly available.
- CVE-2026-16073Low
The Star.text_to_image/NetworkRenderStrategy.render function in the file astrbot/core/star/base.py in AstrBot up to version 4.25.2 is vulnerable to XSS. The attack can be performed remotely and the exploit is publicly available. The vendor did not respond.
- CVE-2026-15501Medium
A server-side request forgery (SSRF) vulnerability has been detected in AstrBot up to version 4.25.2 in the MCP Test Endpoint component. The issue affects the ToolsRoute.test_mcp_connection function in the file astrbot/dashboard/routes/tools.py, where an attacker can manipulate the mcp_server_config.url argument. The vulnerability has been publicly disclosed and can be exploited remotely.
- CVE-2026-15500Medium
A server-side request forgery (SSRF) vulnerability has been identified in AstrBot up to version 4.25.2. The issue exists in the get_online_plugins function within astrbot/dashboard/routes/plugin.py, where manipulation of the custom_registry argument in the market_list endpoint allows remote exploitation. The exploit has been publicly disclosed, increasing the risk of attacks.
- CVE-2026-15499Medium
A security flaw in the Scheduled Task Handler component of AstrBot up to version 4.25.2 affects the FutureTaskTool.call function in astrbot/core/tools/cron_tools.py. Manipulating the payload["note"] argument causes improper authorization, allowing remote exploitation. The exploit has been publicly released and may be used in attacks.
Original NVD description (English source)
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.

