CVE-2026-34824: CWE-125: Out-of-bounds Read in mesop-dev mesop
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.
AI Analysis
Technical Summary
The Mesop Python-based UI framework has a vulnerability (CVE-2026-34824) in versions 1.2.3 through before 1.2.5 where its WebSocket implementation does not properly limit thread creation. An unauthenticated attacker can exploit this by sending a rapid succession of WebSocket messages, causing the server to spawn an unlimited number of operating system threads. This leads to resource exhaustion and Out of Memory conditions, causing a denial of service for applications built on Mesop. The vulnerability is classified as CWE-125 (Out-of-bounds Read) and has a CVSS 3.1 score of 7.5 (high severity). The issue has been patched in Mesop version 1.2.5.
Potential Impact
Successful exploitation results in denial of service due to thread exhaustion and memory exhaustion on the server running the Mesop framework. This affects availability but does not impact confidentiality or integrity. The vulnerability can be triggered by unauthenticated attackers remotely via WebSocket messages.
Mitigation Recommendations
Upgrade affected Mesop installations to version 1.2.5 or later, where this vulnerability has been patched. No other mitigation or temporary workaround is indicated. Patch status is confirmed by the vendor's versioning information.
CVE-2026-34824: CWE-125: Out-of-bounds Read in mesop-dev mesop
Description
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Mesop Python-based UI framework has a vulnerability (CVE-2026-34824) in versions 1.2.3 through before 1.2.5 where its WebSocket implementation does not properly limit thread creation. An unauthenticated attacker can exploit this by sending a rapid succession of WebSocket messages, causing the server to spawn an unlimited number of operating system threads. This leads to resource exhaustion and Out of Memory conditions, causing a denial of service for applications built on Mesop. The vulnerability is classified as CWE-125 (Out-of-bounds Read) and has a CVSS 3.1 score of 7.5 (high severity). The issue has been patched in Mesop version 1.2.5.
Potential Impact
Successful exploitation results in denial of service due to thread exhaustion and memory exhaustion on the server running the Mesop framework. This affects availability but does not impact confidentiality or integrity. The vulnerability can be triggered by unauthenticated attackers remotely via WebSocket messages.
Mitigation Recommendations
Upgrade affected Mesop installations to version 1.2.5 or later, where this vulnerability has been patched. No other mitigation or temporary workaround is indicated. Patch status is confirmed by the vendor's versioning information.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-30T20:52:53.283Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d046900a160ebd9263e68b
Added to database: 4/3/2026, 11:00:32 PM
Last enriched: 4/11/2026, 9:24:11 AM
Last updated: 5/20/2026, 8:52:37 PM
Views: 67
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.