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7.5 High

CVE-2026-28356 multipart is a fast multipart/form-data parser for python

Description

multipart is a fast multipart/form-data parser for python. Prior to 1.2.2, 1.3.1 and 1.4.0-dev, the parse_options_header() function in multipart.py uses a regular expression with an ambiguous alternation, which can cause exponential backtracking (ReDoS) when parsing maliciously crafted HTTP or multipart segment headers. This can be abused for denial of service (DoS) attacks against web applications using this library to parse request headers or multipart/form-data streams. The issue is fixed in 1.2.2, 1.3.1 and 1.4.0-dev.

Affected products and versions

Product Affected versions Fixed in
Red Hat AI Inference Server 3.2 1775252598 earliest → < 1775252598 1775252598
Red Hat OpenShift AI 2.25 1783998857 earliest → < 1783998857 1783998857
Lightspeed Core Versions not published
OpenShift Lightspeed Versions not published
Red Hat AI Inference Server Versions not published
Red Hat Enterprise Linux AI (RHEL AI) 3 Versions not published
Red Hat OpenShift AI (RHOAI) Versions not published
Red Hat Satellite 6 Versions not published
Red Hat Ansible Automation Platform 2 Versions not published
Show the 3 other branches
Product Affected versions Fixed in
multipart 1.3 1.3.0 → < 1.3.1 1.3.1
multipart 1.2 earliest → < 1.2.2 1.2.2
Red Hat OpenShift AI 3.3 1782996080 earliest → < 1782996080 1782996080

References

Timeline

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