mesop-dev mesop up to 1.2.4 WebSocket Message out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in mesop-dev mesop up to 1.2.4. Affected by this vulnerability is an unknown functionality of the component WebSocket Message Handler. Performing a manipulation results in out-of-bounds. This vulnerability is known as CVE-2026-34824. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in mesop-dev mesop up to 1.2.4. It has been classified as problematic. This affects some unknown functionality of the component WebSocket Message Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-34824 since 03/30/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 1.2.5 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 760a2079b5c609038c826d24dfbcf9b0be98d987 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: mesop 1.2.5
Patch: 760a2079b5c609038c826d24dfbcf9b0be98d987

Timelineinfo

03/30/2026 CVE reserved
04/04/2026 +5 days Advisory disclosed
04/04/2026 +0 days VulDB entry created
04/04/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-3jr7-6hqp-x679
Status: Confirmed

CVE: CVE-2026-34824 (🔒)
GCVE (CVE): GCVE-0-2026-34824
GCVE (VulDB): GCVE-100-355245

Entryinfo

Created: 04/04/2026 07:39
Changes: 04/04/2026 07:39 (68)
Complete: 🔍
Cache ID: 216:4D0:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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