CVE-2026-34824
published 2026-04-03CVE-2026-34824: Mesop is a Python-based UI framework that allows users to build web applications. From version 1.2.3 to before version 1.2.5, an uncontrolled resource…
PriorityP346high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.72%
49.3th percentile
Mesop is a Python-based UI framework that allows users to build web applications. From version 1.2.3 to before version 1.2.5, an uncontrolled resource consumption vulnerability exists in the WebSocket implementation of the Mesop framework. An unauthenticated attacker can send a rapid succession of WebSocket messages, forcing the server to spawn an unbounded number of operating system threads. This leads to thread exhaustion and Out of Memory (OOM) errors, causing a complete Denial of Service (DoS) for any application built on the framework. This issue has been patched in version 1.2.5.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mesop-dev | mesop | — | — |
| mesop-dev | mesop | >= 1.2.3 < 1.2.5 | 1.2.5 |
| mesop-dev | mesop | >= 1.2.3 < 1.2.5 | 1.2.5 |
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GHSA
Mesop: Unbounded Thread Creation in WebSocket Handler Leads to Denial of Service
ghsa·2026-04-03
CVE-2026-34824 [HIGH] CWE-125 Mesop: Unbounded Thread Creation in WebSocket Handler Leads to Denial of Service
Mesop: Unbounded Thread Creation in WebSocket Handler Leads to Denial of Service
### Summary
An uncontrolled resource consumption vulnerability exists in the WebSocket implementation of the Mesop framework. An unauthenticated attacker can send a rapid succession of WebSocket messages, forcing the server to spawn an unbounded number of operating system threads. This leads to thread exhaustion and Out of Memory (OOM) errors, causing a complete Denial of Service (DoS) for any application built on the framework.
### Details
The vulnerability stems from an architectural flaw in how incoming WebSocket messages are processed. In the `mesop/server/server.py` file, the `handle_websocket` function listens for incoming messages and immediately spawns a new `threading.Thread` for every successfully
OSV
Mesop: Unbounded Thread Creation in WebSocket Handler Leads to Denial of Service
osv·2026-04-03
CVE-2026-34824 [HIGH] Mesop: Unbounded Thread Creation in WebSocket Handler Leads to Denial of Service
Mesop: Unbounded Thread Creation in WebSocket Handler Leads to Denial of Service
### Summary
An uncontrolled resource consumption vulnerability exists in the WebSocket implementation of the Mesop framework. An unauthenticated attacker can send a rapid succession of WebSocket messages, forcing the server to spawn an unbounded number of operating system threads. This leads to thread exhaustion and Out of Memory (OOM) errors, causing a complete Denial of Service (DoS) for any application built on the framework.
### Details
The vulnerability stems from an architectural flaw in how incoming WebSocket messages are processed. In the `mesop/server/server.py` file, the `handle_websocket` function listens for incoming messages and immediately spawns a new `threading.Thread` for every successfully
No detection rules found.
No public exploits indexed.
2026-04-03
Published