PT-2026-22741 · Django+1 · Django+1

Natalia Bidart + 1 · Published 2026-03-03 · Updated 2026-05-13 · CVE-2026-25673

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Django versions 6.0 through 6.0.2 Django versions 5.2 through 5.2.11 Django versions 4.2 through 4.2.28 Django versions 5.0.x and earlier Django versions 4.1.x and earlier Django versions 3.2.x and earlier

Description The URLField.to python() function in Django calls urllib.parse.urlsplit(), which performs NFKC normalization on Windows. This normalization is disproportionately slow for certain Unicode characters, potentially allowing a remote attacker to cause a denial of service by submitting large URL inputs containing these characters.

Recommendations Update Django to version 6.0.3 or later. Update Django to version 5.2.12 or later. Update Django to version 4.2.29 or later.

Fix

DoS

Allocation of Resources Without Limits

Resource Exhaustion

Weakness Enumeration

CWE-770

CWE-400

Related Identifiers

BDU:2026-07737

BIT-DJANGO-2026-25673

CVE-2026-25673

ECHO-DE02-7575-4370

GHSA-8P8V-WH79-9R56

Affected Products

Django

Red Os

References · 20

• https://osv.dev/vulnerability/CVE-2026-25673 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-8p8v-wh79-9r56 · Vendor Advisory
• https://djangoproject.com/weblog/2026/mar/03/security-releases · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-25673 · Security Note
• https://bdu.fstec.ru/vul/2026-07737 · Security Note
• https://osv.dev/vulnerability/BIT-django-2026-25673 · Vendor Advisory
• https://github.com/django/django · Note
• https://github.com/django/django/commit/b3e8ec8cc310489fe80174b14b11edb970d682ea · Note
• https://github.com/django/django/commit/b1444d9acf43db9de96e0da2b4737ad56af0eb76 · Note
• https://github.com/django/django/commit/4d3c184686626d224d9a87451410ecf802b41f7c · Note
• https://docs.djangoproject.com/en/dev/releases/security · Vendor Advisory, Patch
• https://github.com/advisories/GHSA-8p8v-wh79-9r56 · Note
• https://twitter.com/the_yellow_fall/status/2029019975021694980 · Twitter Post
• https://twitter.com/oss_security/status/2030574831373070392 · Twitter Post
• https://redos.red-soft.ru/search/?iblock_id=&q=CVE-2026-25673 · Note