PraisonAI is a multi-agent teams system. Prior to 1.5.115, execute_code() in praisonaiagents.tools.python_tools defaults to sandbox_mode="sandbox", which runs user code in a subprocess wrapped with a restricted __builtins__ dict and an AST-based blocklist. The AST blocklist embedded inside the subprocess wrapper (blocked_attrs of python_tools.py) contains only 11 attribute names — a strict subset of the 30+ names blocked in the direct-execution path. The four attributes that form a frame-traversal chain out of the sandbox are all absent from the subprocess list (__traceback__, tb_frame, f_back, and f_builtins). Chaining these attributes through a caught exception exposes the real Python builtins dict of the subprocess wrapper frame, from which exec can be retrieved and called under a non-blocked variable name — bypassing every remaining security layer. This vulnerability is fixed in 1.5.115.
References
| Link | Resource |
|---|---|
| https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-qf73-2hrx-xprp | Vendor Advisory |
Configurations
History
15 Apr 2026, 18:02
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-qf73-2hrx-xprp - Vendor Advisory | |
| CPE | cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:* | |
| First Time |
Praison
Praison praisonai |
08 Apr 2026, 21:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-08 21:17
Updated : 2026-04-15 18:02
NVD link : CVE-2026-39888
Mitre link : CVE-2026-39888
CVE.ORG link : CVE-2026-39888
JSON object : View
Products Affected
praison
- praisonai