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CVE-2026-25673

7.5 · HIGH

An issue was discovered in 6.0 before 6.0.3, 5.2 before 5.2.12, and 4.2 before 4.2.29.

Published Mar 3, 2026CWE-400EPSS 1.14%

Overview

CVE-2026-25673 is a high-severity vulnerability. It was published on March 3, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refdocs.djangoproject.com/en/dev/releases/security/Refgroups.google.com/g/django-announceRefwww.djangoproject.com/weblog/2026/mar/03/security-releases/Refaccess.redhat.com/security/cve/CVE-2026-25673Refbugzilla.redhat.com/show_bug.cgi?id=2444115Refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25673.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-25673?

CVE-2026-25673 is a high-severity vulnerability. It was published on March 3, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-25673?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-25673?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-25673?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-25673 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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