CVE-2026-25673 (GCVE-0-2026-25673)
Vulnerability from cvelistv5
Published
2026-03-03 14:28
Modified
2026-07-15 01:16
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-400 - Uncontrolled Resource Consumption
Summary
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.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
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Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| djangoproject | Django |
Version: 6.0 ≤ Version: 5.2 ≤ Version: 4.2 ≤ |
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[{\"lang\": \"en\", \"time\": \"2026-01-27T12:00:00.000Z\", \"value\": \"Initial report received.\"}, {\"lang\": \"en\", \"time\": \"2026-02-20T12:00:00.000Z\", \"value\": \"Vulnerability confirmed.\"}, {\"lang\": \"en\", \"time\": \"2026-03-03T08:00:00.000Z\", \"value\": \"Security release issued.\"}], \"datePublic\": \"2026-03-03T08:00:00.000Z\", \"references\": [{\"url\": \"https://docs.djangoproject.com/en/dev/releases/security/\", \"name\": \"Django security archive\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://groups.google.com/g/django-announce\", \"name\": \"Django releases announcements\", \"tags\": [\"mailing-list\"]}, {\"url\": \"https://www.djangoproject.com/weblog/2026/mar/03/security-releases/\", \"name\": \"Django security releases issued: 6.0.3, 5.2.12, and 4.2.29\", \"tags\": [\"vendor-advisory\"]}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"An issue was discovered in 6.0 before 6.0.3, 5.2 before 5.2.12, and 4.2 before 4.2.29.\\n`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.\\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\\nDjango would like to thank Seokchan Yoon for reporting this issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eAn issue was discovered in 6.0 before 6.0.3, 5.2 before 5.2.12, and 4.2 before 4.2.29.\u003c/p\u003e\u003cp\u003e`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.\u003c/p\u003e\u003cp\u003eEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\u003c/p\u003e\u003cp\u003eDjango would like to thank Seokchan Yoon for reporting this issue.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-400\", \"description\": \"CWE-400: Uncontrolled Resource Consumption\"}]}], \"providerMetadata\": {\"orgId\": \"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\", \"shortName\": \"DSF\", \"dateUpdated\": \"2026-03-03T14:28:28.601Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-25673\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-15T01:16:05.116Z\", \"dateReserved\": \"2026-02-04T18:27:10.657Z\", \"assignerOrgId\": \"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\", \"datePublished\": \"2026-03-03T14:28:28.601Z\", \"assignerShortName\": \"DSF\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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