{"id":"CVE-2026-33033","aliases":["BIT-django-2026-33033","GHSA-5mf9-h53q-7mhq","PYSEC-2026-48"],"url":"https://o3.security/vulnerability/CVE-2026-33033","summary":"Potential denial-of-service vulnerability in MultiPartParser via base64-encoded file upload","details":"An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30.\n`MultiPartParser` allows remote attackers to degrade performance by submitting multipart uploads with `Content-Transfer-Encoding: base64` including excessive whitespace.\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\nDjango would like to thank Seokchan Yoon for reporting this issue.","published":"2026-04-07T14:22:48.624Z","modified":"2026-07-15T10:14:48.684983359Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"django","fixedVersion":"6.0.4"},{"ecosystem":"PyPI","name":"django","fixedVersion":"5.2.13"},{"ecosystem":"PyPI","name":"django","fixedVersion":"4.2.30"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/django/django/"},{"type":"ADVISORY","url":"https://docs.djangoproject.com/en/dev/releases/security/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33033.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33033"},{"type":"ADVISORY","url":"https://www.djangoproject.com/weblog/2026/apr/07/security-releases/"},{"type":"PACKAGE","url":"https://pypi.org/project/Django/"},{"type":"ARTICLE","url":"https://groups.google.com/g/django-announce"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T10:14:48.684983359Z"}}