High severity7.5NVD Advisory· Published Mar 3, 2026· Updated Jul 15, 2026
CVE-2026-25673
CVE-2026-25673
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
DjangoPyPI | >= 6.0, < 6.0.3 | 6.0.3 |
DjangoPyPI | >= 5.2, < 5.2.12 | 5.2.12 |
DjangoPyPI | >= 4.2, < 4.2.29 | 4.2.29 |
Affected products
7cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*range: >=4.2.0,<4.2.29
- (no CPE)range: 6.0
- osv-coords5 versionspkg:apk/chainguard/authentik-fipspkg:apk/chainguard/awxpkg:apk/chainguard/label-studiopkg:bitnami/djangopkg:pypi/django
< 2026.2.1-r0+ 4 more
- (no CPE)range: < 2026.2.1-r0
- (no CPE)range: < 24.6.1-r30
- (no CPE)range: < 1.22.0-r7
- (no CPE)range: >= 4.2.0, < 4.2.29
- (no CPE)range: >= 6.0, < 6.0.3
Patches
Vulnerability mechanics
References
10- docs.djangoproject.com/en/dev/releases/security/nvdPatchVendor Advisory
- www.djangoproject.com/weblog/2026/mar/03/security-releases/nvdPatchVendor Advisory
- github.com/advisories/GHSA-8p8v-wh79-9r56ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-25673ghsaADVISORY
- docs.djangoproject.com/en/dev/releases/securityghsaWEB
- groups.google.com/g/django-announcenvdRelease NotesWEB
- www.djangoproject.com/weblog/2026/mar/03/security-releasesghsaWEB
- access.redhat.com/security/cve/CVE-2026-25673nvd
- bugzilla.redhat.com/show_bug.cginvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25673.jsonnvd
News mentions
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