Is CVE-2026-33054 actively exploited?

No active exploitation of CVE-2026-33054 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-33054 be exploited remotely?

Yes. CVE-2026-33054 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-33054?

CVE-2026-33054 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-33054

CWE-22Published: March 20, 2026· Updated: Mar 24, 2026

9.8

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:3.6th

Official Description

Mesop is a Python-based UI framework that allows users to build web applications. Versions 1.2.2 and below contain a Path Traversal vulnerability that allows any user supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation. This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds. This issue has been fixed in version 1.2.3.

NVD Source

Technical Analysis

CVE-2026-33054 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.