CVE-2026-40347

Name
CVE-2026-40347
Description
Python-Multipart is a streaming multipart parser for Python. Versions prior to 0.0.26 have a denial of service vulnerability when parsing crafted `multipart/form-data` requests with large preamble or epilogue sections. Upgrade to version 0.0.26 or later, which skips ahead to the next boundary candidate when processing leading CR/LF data and immediately discards epilogue data after the closing boundary.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security-advisories@github.com https://github.com/Kludex/python-multipart/releases/tag/0.0.26
security-advisories@github.com https://github.com/Kludex/python-multipart/security/advisories/GHSA-mj87-hwqh-73pj

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:fastapiexpert:python-multipart:*:*:*:*:*:python:*:* py3-python-multipart >= None < 0.0.26

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
py3-python-multipart edge-community 0.0.24-r0 Oleg Titov <oleg.titov@gmail.com> possibly vulnerable
py3-python-multipart edge-community 0.0.22-r1 Oleg Titov <oleg.titov@gmail.com> possibly vulnerable
py3-python-multipart edge-community 0.0.22-r0 Oleg Titov <oleg.titov@gmail.com> possibly vulnerable
py3-python-multipart edge-community 0.0.21-r0 Oleg Titov <oleg.titov@gmail.com> possibly vulnerable
py3-python-multipart edge-community 0.0.20-r0 Oleg Titov <oleg.titov@gmail.com> possibly vulnerable
py3-python-multipart edge-community 0.0.19-r0 Oleg Titov <oleg.titov@gmail.com> possibly vulnerable
py3-python-multipart 3.23-community 0.0.20-r0 Oleg Titov <oleg.titov@gmail.com> possibly vulnerable