Django REST framework: Accept header with many large quoted parameters burns ~19s of CPU per request in content negotiation

Summary DRF's content negotiation parses each Accept token several times per request and never limits the number of tokens or their total size. Each parse ends up in Django's parseheaderparameters, which takes quadratic time when a quoted parameter value is packed with semicolons. On my machine a...

Inefficient Algorithmic Complexity

Overview Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design. Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity due to quadratic-time parsing in django.utils.http.parseheaderparameters within...

Python Library Django 5.2.x < 5.2.18 / 6.0.x < 6.0.9 / 6.1.x < 6.1.2 Multiple Vulnerabilities

The detected version of the Django Python package is 5.2.x prior to 5.2.18, or 6.0.x prior to 6.0.9, or 6.1.x prior to 6.1.2. It is, therefore, affected by multiple vulnerabilities, including: - django.utils.translation.getsupportedlanguagevariant is subject to a potential denial-of-service attac...

SUSE CVE-2026-84429

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.utils.http.parseheaderparameters was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An...

DEBIAN-CVE-2026-84429

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.utils.http.parseheaderparameters was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An...

CVE-2026-84429

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.utils.http.parseheaderparameters was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An...

CVE-2026-84429 Potential denial-of-service vulnerability in HTTP header parsing

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.utils.http.parseheaderparameters was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An...

CVE-2026-84429 Potential denial-of-service vulnerability in HTTP header parsing

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.utils.http.parseheaderparameters was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An...

CVE-2026-84429

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. "django.utils.http.parseheaderparameters" was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An...

CVE-2026-84429 Potential denial-of-service vulnerability in HTTP header parsing

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.utils.http.parseheaderparameters was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An...

EUVD-2026-93417

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.utils.http.parseheaderparameters was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An...

CVE-2026-84429

The Django web framework is vulnerable to a potential denial-of-service (DoS) attack affecting versions 6.1 before 6.1.2 , 6.0 before 6.0.9 , and 5.2 before 5.2.18 . The root cause is quadratic time complexity in the django.utils.http.parse_header_parameters() function when parsing values contain...

CVE-2026-84429

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.utils.http.parseheaderparameters was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An...

CVE-2026-84429: Inefficient Algorithmic Complexity

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.utils.http.parseheaderparameters was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An...

CVE-2026-84429: Inefficient Algorithmic Complexity

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.utils.http.parseheaderparameters was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An...

PT-2026-106733

Name of the Vulnerable Software and Affected Versions Django versions prior to 6.1.2 Django versions prior to 6.0.9 Django versions prior to 5.2.18 Description A denial-of-service issue exists in the django.utils.http.parse header parameters function. The problem arises from quadratic time...

Linux Distros Unpatched Vulnerability : CVE-2026-84429

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. django.utils.http.parseheaderparameters was subject to a potential...