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Tracking
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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-vffw-93wf-4j4q | python-multipart: Content-Disposition parameter smuggling via RFC 2231/5987 extended parameters |
Tue, 23 Jun 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 22 Jun 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Kludex
Kludex python-multipart |
|
| Vendors & Products |
Kludex
Kludex python-multipart |
Mon, 22 Jun 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, parse_options_header parsed Content-Disposition (and Content-Type) headers with email.message.Message, which transparently applies RFC 2231/5987 decoding. The extended parameter syntax (filename*=charset'lang'value, name*=..., and the filename*0/filename*1 continuation form) is decoded and surfaced under the bare filename/name key, and overrides the plain parameter when both are present. RFC 7578 §4.2 explicitly forbids the filename* form in multipart/form-data. Components that follow RFC 7578, or that do not implement RFC 2231/5987 decoding for multipart/form-data (WAFs, proxies, gateways), may interpret such a header differently. An attacker can exploit that difference to smuggle a different field name or filename past an upstream inspector to the backend. This vulnerability is fixed in 0.0.30. | |
| Title | Python-Multipart: Content-Disposition parameter smuggling via RFC 2231/5987 extended parameters | |
| Weaknesses | CWE-20 CWE-436 |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-23T16:08:07.690Z
Reserved: 2026-06-09T18:13:07.262Z
Link: CVE-2026-53537
Updated: 2026-06-23T16:03:19.747Z
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OpenCVE Enrichment
Updated: 2026-06-22T20:00:05Z
Github GHSA