Allocation of Resources Without Limits or Throttling Affecting py3-django package, versions <4.2.29-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.73% (50th percentile)

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  • Snyk IDSNYK-ALPINE323-PY3DJANGO-15426803
  • published6 Mar 2026
  • disclosed3 Mar 2026

Introduced: 3 Mar 2026

CVE-2026-25673  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Alpine:3.23 py3-django to version 4.2.29-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream py3-django package and not the py3-django package as distributed by Alpine. See How to fix? for Alpine:3.23 relevant fixed versions and status.

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 Base Scores

version 3.1