Vulnerability advisory

PYSEC-2026-48

Published Apr 7, 2026Updated Jun 10, 2026OSV record ↗

Also known as BIT-django-2026-33033CVE-2026-33033GHSA-5mf9-h53q-7mhq

Severity

CVSS 3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

django PyPI

Affected	Fixed in
`4.2` to before 4.2.30	`4.2.30`Advisories →
`5.2` to before 5.2.13	`5.2.13`Advisories →
`6.0` to before 6.0.4	`6.0.4`Advisories →
Also listed as affected (47) `4.2` `4.2.1` `4.2.10` `4.2.11` `4.2.12` `4.2.13` `4.2.14` `4.2.15` `4.2.16` `4.2.17` `4.2.18` `4.2.19` `4.2.2` `4.2.20` `4.2.21` `4.2.22` `4.2.23` `4.2.24` `4.2.25` `4.2.26` `4.2.27` `4.2.28` `4.2.29` `4.2.3` `4.2.4` `4.2.5` `4.2.6` `4.2.7` `4.2.8` `4.2.9` `5.2` `5.2.1` `5.2.10` `5.2.11` `5.2.12` `5.2.2` `5.2.3` `5.2.4` `5.2.5` `5.2.6` `5.2.7` `5.2.8` `5.2.9` `6.0` `6.0.1` `6.0.2` `6.0.3`

Description

An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30. MultiPartParser allows remote attackers to degrade performance by submitting multipart uploads with Content-Transfer-Encoding: base64 including excessive whitespace. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Seokchan Yoon for reporting this issue.

PYSEC-2026-48

Affected versions

django PyPI

Description

References