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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Kludex | python-multipart | < 0.0.26 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | python-multipart | 0.0.26-1 | — |
| Debian 13 | python-multipart | No fix yet | — |
| Debian 12 | python-multipart | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | python-multipart | No fix yet | — |
| Ubuntu 26.04 LTS | python-multipart | No fix yet | — |
| Ubuntu 25.10 | python-multipart | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | python-multipart | No fix yet | — |
| Ubuntu Pro 22.04 LTS | python-multipart | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | python-python-multipart | 0.0.20-160000.4.1 | SUSE-SU-2026:21999-1 |
| SLES 16.0 | python-python-multipart | 0.0.20-160000.4.1 | SUSE-SU-2026:21999-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-python-multipart | 0.0.26-1.1 | openSUSE-SU-2026:10597-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | airflow-3 | 3.2.1-r0 | — |
| Wolfi rolling | kserve-storage-controller | 0.17.0-r2 | — |
| Wolfi rolling | semgrep | 1.160.0-r1 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | python-multipart | < 0.0.26 | 0.0.26 | GHSA-mj87-hwqh-73pj |
Advisories 4
- WID-SEC-2026-3046 IBM Concert: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- WID-SEC-2026-1407 IBM App Connect Enterprise Certified Container: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 3, 2026
- SUSE-SU-2026:21999-1 Security update for python-python-multipart SUSE / openSUSE Security Updates · Jun 9, 2026
- openSUSE-SU-2026:10597-1 python311-python-multipart-0.0.26-1.1 on GA media SUSE / openSUSE Security Updates · Apr 22, 2026