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CVE-2026-34824

Mesop-dev Mesop out-of-bounds read

7.5 HIGHPublic exploitEPSS 0.67%
  1. Published3 Apr 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Mesop-dev Mesop≥ 1.2.3 < 1.2.5

Remediation

Fixed in
Mesop-dev Mesop≥ 1.2.5

References

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Frequently asked

Is CVE-2026-34824 being actively exploited?

CVE-2026-34824 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.67%.

How severe is CVE-2026-34824?

CVE-2026-34824 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.67% probability of exploitation.

Which products are affected by CVE-2026-34824?

Affected products include Mesop-dev Mesop.

How do I fix CVE-2026-34824?

Upgrade affected software to a fixed version, for example Mesop-dev Mesop 1.2.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-34824 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.