| Name | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| python-django (PTS) | bullseye | 2:2.2.28-1~deb11u2 | fixed |
| bullseye (security) | 2:2.2.28-1~deb11u12 | fixed | |
| bookworm | 3:3.2.19-1+deb12u1 | fixed | |
| bookworm (security) | 3:3.2.25-0+deb12u2 | fixed | |
| trixie | 3:4.2.23-1 | fixed | |
| trixie (security) | 3:4.2.28-0+deb13u1 | fixed | |
| forky | 3:4.2.28-1 | fixed | |
| sid | 3:4.2.29-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python-django | source | (unstable) | (not affected) |
- python-django <not-affected> (Windows-specific)
https://www.djangoproject.com/weblog/2026/mar/03/security-releases/