medium5.3
CVE-2026-93421
Mesop is a Python-based UI framework that allows users to build web applications.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | mesop | <= 1.3.3 | 1.3.4 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-g7f6-rxc4-qhph
- https://github.com/mesop-dev/mesop/security/advisories/GHSA-g7f6-rxc4-qhph
- https://github.com/mesop-dev/mesop/pull/1397
- https://github.com/mesop-dev/mesop/commit/f38c42a1d3eba246941ef8d7f645072d53c58785
- https://github.com/mesop-dev/mesop/releases/tag/v1.3.4