Allocation of Resources Without Limits or Throttling Affecting python-multipart package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.74% (52nd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-PYTHONMULTIPART-16748458
  • published18 May 2026
  • disclosed13 May 2026

Introduced: 13 May 2026

CVE-2026-42561  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

There is no fixed version for Debian:unstable python-multipart.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-multipart package and not the python-multipart package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.27, python-multipart has a denial of service vulnerability in multipart part header parsing. When parsing multipart/form-data, MultipartParser previously had no limit on the number of part headers or the size of an individual part header. An attacker could send a request with either many repeated headers without terminating the header block or a single very large header value, causing excessive CPU work before request rejection or completion. This vulnerability is fixed in 0.0.27.

CVSS Base Scores

version 3.1