CVE-2026-25673

HIGH EPSS 47.6%
Published Mar 3, 20263mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 3, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

An issue was discovered in 6.0 before 6.0.3, 5.2 before 5.2.12, and 4.2 before 4.2.29. `URLField.to_python()` in Django calls `urllib.parse.urlsplit()`, which performs NFKC normalization on Windows that is disproportionately slow for certain Unicode characters, allowing a remote attacker to cause denial of service via large URL inputs containing these characters. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Seokchan Yoon for reporting this issue.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
47.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-400 Uncontrolled Resource Consumption Resource Mgmt
CWE-770

Affected Products 3

VendorProductVersionRange
djangoprojectdjango*≥4.2.0  –  <4.2.29
djangoprojectdjango*≥5.2  –  <5.2.12
djangoprojectdjango*≥6.0  –  <6.0.3

References 3

  • docs.djangoproject.com https://docs.djangoproject.com/en/dev/releases/security/
    PatchVendor Advisory
  • groups.google.com https://groups.google.com/g/django-announce
    Release Notes
  • djangoproject.com https://www.djangoproject.com/weblog/2026/mar/03/security-releases/
    PatchVendor Advisory

Remediation

  • docs.djangoproject.com https://docs.djangoproject.com/en/dev/releases/security/
    PatchVendor Advisory
  • djangoproject.com https://www.djangoproject.com/weblog/2026/mar/03/security-releases/
    PatchVendor Advisory