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.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - 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. (CVE-2026-25673)

  - An issue was discovered in 6.0 before 6.0.3, 5.2 before 5.2.12, and 4.2 before 4.2.29. Race condition in
    file-system storage and file-based cache backends in Django allows an attacker to cause file system
    objects to be created with incorrect permissions via concurrent requests, where one thread's temporary
    `umask` change affects other threads in multi-threaded environments. 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
    Tarek Nakkouch for reporting this issue. (CVE-2026-25674)

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-25673)

The detected version of the Django Python package, is 4.2.x prior to 4.2.29, 5.2.x prior to 5.2.12, or 6.0.x prior to 6.0.3. It is, therefore, affected by a denial of service vulnerability as referenced by security release advisory:

  - 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. (CVE-2026-25673)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
438419	Alpine: multiple py3-django packages: security update to 4.2.29-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	low
438419	Alpine: multiple py3-django packages: security update to 4.2.29-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	low
438355	SCA: security update for Django (GHSA-8p8v-wh79-9r56)	Tenable Cloud Security	SCA Checks	high
438355	SCA: security update for Django (GHSA-8p8v-wh79-9r56)	Tenable Self-Hosted Container Security	SCA Checks	high
300915	Python Library Django 4.2.x < 4.2.29 / 5.2.x < 5.2.12 / 6.0.x < 6.0.3 DoS	Nessus	Windows	high

Detections

Analytics

CVE-2026-25673

high

Tenable Plugins

low

low

high

high

high