CVE-2026-93421

Mesop is a Python-based UI framework that allows users to build web applications. Prior to 1.3.4, the unauthenticated /__csp__ endpoint passes attacker-controlled document-uri, blocked-uri, and violated-directive values to the csp_report handler in mesop/server/static_file_serving.py, which prints them to standard output without neutralizing terminal control sequences. When an operator views the resulting logs in an ANSI-capable terminal, injected ANSI or VT100 sequences can clear or reposition the display, hide text, or present forged messages, reducing the integrity of monitoring and incident-response output. This issue is fixed in version 1.3.4.

CVSS

No CVSS.

References

Link	Resource
https://github.com/mesop-dev/mesop/commit/f38c42a1d3eba246941ef8d7f645072d53c58785
https://github.com/mesop-dev/mesop/pull/1397
https://github.com/mesop-dev/mesop/releases/tag/v1.3.4
https://github.com/mesop-dev/mesop/security/advisories/GHSA-g7f6-rxc4-qhph

Configurations

No configuration.

History

23 Sep 2026, 19:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-23 19:19

Updated : 2026-09-30 17:32

NVD link : CVE-2026-93421

Mitre link : CVE-2026-93421

CVE.ORG link : CVE-2026-93421

JSON object : View

Products Affected

No product.

CWE

CWE-117

Improper Output Neutralization for Logs

CWE-150

Improper Neutralization of Escape, Meta, or Control Sequences

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