Upsonic - Unauthenticated Remote Code Execution via Cloudpickle Deserialization in add_tool Endpoint
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2026-0773. PoCs published by exploitintel.
AI-analyzed exploit summary The repository contains functional exploit code for CVE-2026-0773, demonstrating unauthenticated remote code execution via cloudpickle deserialization in the Upsonic AI Agent Framework. Multiple PoC scripts target different endpoints, confirming RCE with detailed verification steps.
Description
Upsonic Cloudpickle Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Upsonic. Authentication is not required to exploit this vulnerability. The specific flaw exists within the add_tool endpoint, which listens on TCP port 7541 by default. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-26845.
Exploits (1)
The repository contains functional exploit code for CVE-2026-0773, demonstrating unauthenticated remote code execution via cloudpickle deserialization in the Upsonic AI Agent Framework. Multiple PoC scripts target different endpoints, confirming RCE with detailed verification steps.
References (1)
Scores
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
