3.7

CVE-2026-53540

Python-Multipart: Negative Content-Length in parse_form buffers the entire body in memory

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.31, parse_form() did not validate the Content-Length header before using it to bound its chunked read of the request body. A negative Content-Length turned the bounded read into a read-until-EOF, so the entire body was loaded into memory in a single read instead of in fixed-size chunks. This vulnerability is fixed in 0.0.31.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Fastapiexpert ≫ Python-multipart SwPlatformpython Version < 0.0.31
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.22% 0.123
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 3.7 2.2 1.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-1284 Improper Validation of Specified Quantity in Input

The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

https://github.com/Kludex/python-multipart/security/advisories/GHSA-v9pg-7xvm-68hf
Vendor Advisory