# CVE-2023-46136: python-werkzeug: Werkzeug is a comprehensive WSGI web application library

CVE-2023-46136 is fixed in python-werkzeug on 1 platform, first by DEBIAN-CVE-2023-46136, released October 25, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-46136
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0129
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 25, 2023

## Description

Werkzeug is a comprehensive WSGI web application library. In versions on the 3.x branch prior to 3.0.1 and on the 2.x branch prior to 2.3.8, if an upload of a file that starts with CR or LF and then is followed by megabytes of data without these characters: all of these bytes are appended chunk by chunk into internal bytearray and lookup for boundary is performed on growing buffer. This allows an attacker to cause a denial of service by sending crafted multipart data to an endpoint that will parse it. The amount of CPU time required can block worker processes from handling legitimate requests. This vulnerability has been patched in version 3.0.1 and 2.3.8.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-werkzeug Debian 12.15 (bookworm) | 2.2.2-3+deb12u1 | [DEBIAN-CVE-2023-46136](https://patchblox.com/security/data/fix/linux/debian-cve-2023-46136.md) | Oct 25, 2023 |
| Linux | python-werkzeug Debian 13.5 (trixie) | 3.0.1-2 | [DEBIAN-CVE-2023-46136](https://patchblox.com/security/data/fix/linux/debian-cve-2023-46136.md) | Oct 25, 2023 |
| Linux | python-werkzeug Debian 14 | 3.0.1-2 | [DEBIAN-CVE-2023-46136](https://patchblox.com/security/data/fix/linux/debian-cve-2023-46136.md) | Oct 25, 2023 |

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