# mesop (PyPI) vulnerabilities

6 known vulnerabilities (2 critical, 3 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 1.3.7 (Sep 26, 2026): no advisory affects it
- Newest unaffected release: 1.3.7 (Sep 26, 2026), the latest release
- Weekly downloads: 2,186
- Dependents: 7
- Releases: 108 since 0.0.1 (Dec 13, 2023)
- Registry: https://pypi.org/project/mesop/
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-93421: 0.0.1 to 1.3.3 (1.3.4 is outside it)
- CVE-2026-34824: 1.2.3 to 1.2.5rc1 (1.2.5 is outside it)
- CVE-2026-33057: 0.0.1 to 1.2.2 (1.2.3 is outside it)
- CVE-2026-33054: 0.0.1 to 1.2.2 (1.2.3 is outside it)
- CVE-2025-30358: 0.0.1 to 0.14.1rc1 (0.14.1 is outside it)
- CVE-2024-45601: 0.9.0 to 0.12.4rc0 (0.12.4 is outside it)

## Advisories (6)

### [CVE-2026-93421](https://cve.now/CVE-2026-93421): Mesop: Unauthenticated ANSI Escape Sequence Injection in CSP Reporting Endpoint

- Severity: Medium 5.3
- Published: Sep 23, 2026
- Affected: fixed in 1.3.4.
- Fixed in 1.3.4 (released Aug 1, 2026, 53 days before disclosure).
- The latest release, 1.3.7, is not affected.

### [CVE-2026-34824](https://cve.now/CVE-2026-34824): Mesop: Unbounded Thread Creation in WebSocket Handler Leads to Denial of Service

- Severity: High 7.5
- Published: Apr 3, 2026
- Affected: from 1.2.3, fixed in 1.2.5.
- Fixed in 1.2.5 (released Mar 31, 2026, 3 days before disclosure).
- The latest release, 1.3.7, is not affected.

### [CVE-2026-33057](https://cve.now/CVE-2026-33057): Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

- Severity: Critical 9.8
- Published: Mar 20, 2026
- Affected: fixed in 1.2.3.
- Fixed in 1.2.3 (released Mar 16, 2026, 4 days before disclosure).
- The latest release, 1.3.7, is not affected.

### [CVE-2026-33054](https://cve.now/CVE-2026-33054): Mesop: Path Traversal utilizing \`FileStateSessionBackend\` leads to Application Denial of Service and File Write/Deletion

- Severity: Critical 10.0
- Published: Mar 20, 2026
- Affected: fixed in 1.2.3.
- Fixed in 1.2.3 (released Mar 16, 2026, 4 days before disclosure).
- The latest release, 1.3.7, is not affected.

### [CVE-2025-30358](https://cve.now/CVE-2025-30358): Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

- Severity: High 8.1
- Published: Mar 27, 2025
- Affected: fixed in 0.14.1.
- Fixed in 0.14.1 (released Jan 3, 2025, 83 days before disclosure).
- The latest release, 1.3.7, is not affected.

### [CVE-2024-45601](https://cve.now/CVE-2024-45601): Local file Inclusion via static file serving functionality in Mesop

- Severity: High 7.5
- Published: Sep 18, 2024
- Affected: from 0.9.0, fixed in 0.12.4.
- Fixed in 0.12.4 (released Sep 11, 2024, 7 days before disclosure).
- The latest release, 1.3.7, is not affected.

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