# CVE-2026-33057: PYSEC-2026-412 - Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

Source: https://junglewise.ai/threats/cve-2026-33057-mesop-affected-by-unauthenticated-remote-code-execution-via-test  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-29  
License: CC BY 4.0 with a link back

CVE-2026-33057 · Severity: low · CVSS 3.1 · Published 2026-06-29

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

Technologies: [mesop (PyPI)](https://junglewise.ai/threats/technologies/mesop). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-33057 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33057 being exploited in the wild.

**How severe is CVE-2026-33057?** Low severity, with a CVSS score of 3.1, published 29 June 2026.

**Which products and versions are affected?** mesop (PyPI) ECOSYSTEM:introduced=0,fixed=1.2.3.

**Is there a fix for CVE-2026-33057?** Yes. mesop (PyPI): upgrade to 1.2.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-33057?** Check whether you run mesop (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- mesop (PyPI): upgrade to 1.2.3 or later

  ```sh
  pip install "mesop>=1.2.3"
  ```


## Affected products

- mesop (PyPI) ECOSYSTEM:introduced=0,fixed=1.2.3

## Identifiers

- CVE-2026-33057
- GHSA-gjgx-rvqr-6w6v
- PYSEC-2026-412

## Related threats

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- [PYSEC-2026-1625 - Mesop has a local file Inclusion via static file serving functionality](https://junglewise.ai/threats/cve-2024-45601-mesop-has-a-local-file-inclusion-via-static-file-serving)
- [Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion](https://junglewise.ai/threats/cve-2026-33054-mesop-has-a-path-traversal-utilizing-filestatesessionbackend)
- [mesop-dev Mesop uncontrolled resource consumption in WebSocket handler](https://junglewise.ai/threats/cve-2026-34824-mesop-dev-mesop-uncontrolled-resource-consumption-in-websocket)