{"id":"CVE-2026-25673","aliases":["ALPINE-CVE-2026-25673","BIT-django-2026-25673","CLSA-2026-1788167080","CLSA-2026-1793609074","CLSA-2026-1793611298","CLSA-2026-1793695167","CLSA-2026-1793696695","EUVD-2026-9294","GHSA-8p8v-wh79-9r56","PYSEC-2026-2448"],"status":"published","title":"Potential denial-of-service vulnerability in URLField via Unicode normalization on Windows","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.\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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00842,"percentile":0.5836,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400","CWE-770"],"published":"2026-03-03T14:28:28Z","modified":"2026-11-03T13:30:03Z","fixes":[{"ecosystem":"PyPI","package":"django","fixed_in":["6.0.3","5.2.12","4.2.29"],"sources":["ghsa","osv"]},{"ecosystem":"Alpine:v3.23","package":"py3-django","fixed_in":["4.2.29-r0"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"django","fixed_in":["4.2.29","5.2.12","6.0.3"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0"},{"fixed":"6.0.3"}]}]},{"source":"ghsa","ecosystem":"PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.2"},{"fixed":"5.2.12"}]}]},{"source":"ghsa","ecosystem":"PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2"},{"fixed":"4.2.29"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"py3-django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.29-r0"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"django","ranges":[{"type":"SEMVER","events":[{"introduced":"4.2.0"},{"fixed":"4.2.29"},{"introduced":"5.2.0"},{"fixed":"5.2.12"},{"introduced":"6.0.0"},{"fixed":"6.0.3"}]}]},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2"},{"fixed":"4.2.post9+tuxcare"}]}],"versions":["4.2","4.2.post1+tuxcare","4.2.post2+tuxcare","4.2.post3+tuxcare","4.2.post4+tuxcare","4.2.post5+tuxcare","4.2.post6+tuxcare","4.2.post7+tuxcare","4.2.post8+tuxcare"],"bundled":5},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.1.10"},{"fixed":"5.1.10.post8+tuxcare"}]}],"versions":["5.1.10","5.1.10.post1+tuxcare","5.1.10.post2+tuxcare","5.1.10.post3+tuxcare","5.1.10.post4+tuxcare","5.1.10.post5+tuxcare","5.1.10.post6+tuxcare","5.1.10.post7+tuxcare"],"bundled":7},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0"},{"fixed":"4.0.post26+tuxcare"}]}],"versions":["4.0","4.0.post1+tuxcare","4.0.post10+tuxcare","4.0.post11+tuxcare","4.0.post12+tuxcare","4.0.post13+tuxcare","4.0.post14+tuxcare","4.0.post15+tuxcare","4.0.post16+tuxcare","4.0.post17+tuxcare","4.0.post18+tuxcare","4.0.post19+tuxcare","4.0.post2+tuxcare","4.0.post20+tuxcare","4.0.post21+tuxcare","4.0.post22+tuxcare","4.0.post23+tuxcare","4.0.post24+tuxcare","4.0.post25+tuxcare","4.0.post3+tuxcare","4.0.post4+tuxcare","4.0.post5+tuxcare","4.0.post6+tuxcare","4.0.post7+tuxcare","4.0.post8+tuxcare","4.0.post9+tuxcare"],"bundled":6},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.1.9"},{"fixed":"5.1.9.post10+tuxcare"}]}],"versions":["5.1.9","5.1.9.post1+tuxcare","5.1.9.post2+tuxcare","5.1.9.post3+tuxcare","5.1.9.post4+tuxcare","5.1.9.post5+tuxcare","5.1.9.post6+tuxcare","5.1.9.post7+tuxcare","5.1.9.post8+tuxcare","5.1.9.post9+tuxcare"],"bundled":7},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2.25"},{"fixed":"3.2.25.post14+tuxcare"}]}],"versions":["3.2.25","3.2.25.post1+tuxcare","3.2.25.post10+tuxcare","3.2.25.post11+tuxcare","3.2.25.post12+tuxcare","3.2.25.post13+tuxcare","3.2.25.post2+tuxcare","3.2.25.post3+tuxcare","3.2.25.post4+tuxcare","3.2.25.post5+tuxcare","3.2.25.post6+tuxcare","3.2.25.post7+tuxcare","3.2.25.post8+tuxcare","3.2.25.post9+tuxcare"],"bundled":9},{"source":"osv","ecosystem":"PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0"},{"fixed":"6.0.3"}]}],"versions":["6.0","6.0.1","6.0.2"]},{"source":"osv","ecosystem":"PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.2"},{"fixed":"5.2.12"}]}],"versions":["5.2","5.2.1","5.2.10","5.2.11","5.2.2","5.2.3","5.2.4","5.2.5","5.2.6","5.2.7","5.2.8","5.2.9"]},{"source":"osv","ecosystem":"PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2"},{"fixed":"4.2.29"}]}],"versions":["4.2","4.2.1","4.2.10","4.2.11","4.2.12","4.2.13","4.2.14","4.2.15","4.2.16","4.2.17","4.2.18","4.2.19","4.2.2","4.2.20","4.2.21","4.2.22","4.2.23","4.2.24","4.2.25","4.2.26","4.2.27","4.2.28","4.2.3","4.2.4","4.2.5","4.2.6","4.2.7","4.2.8","4.2.9"]},{"source":"osv","ecosystem":"PyPI","package":"django","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2"},{"fixed":"4.2.29"},{"introduced":"5.2"},{"fixed":"5.2.12"},{"introduced":"6.0"},{"fixed":"6.0.3"}]}],"versions":["4.2","4.2.1","4.2.10","4.2.11","4.2.12","4.2.13","4.2.14","4.2.15","4.2.16","4.2.17","4.2.18","4.2.19","4.2.2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hat","product":"red hat ansible automation platform 2"},{"vendor":"red hat","product":"red hat discovery 2"},{"vendor":"red hat","product":"red hat satellite 6"}],"references":[{"url":"https://docs.djangoproject.com/en/dev/releases/security/","tags":["vendor-advisory","Patch","Vendor Advisory","advisory"]},{"url":"https://groups.google.com/g/django-announce","tags":["mailing-list","Release Notes","article","web"]},{"url":"https://www.djangoproject.com/weblog/2026/mar/03/security-releases/","tags":["vendor-advisory","Patch","Vendor Advisory","advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-25673","tags":["vdb-entry","x_refsource_REDHAT","web","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2444115","tags":["issue-tracking","x_refsource_REDHAT","web","report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25673.json","tags":["x_sadp-csaf-vex","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25673","tags":["web","advisory"]},{"url":"https://docs.djangoproject.com/en/dev/releases/security","tags":["web"]},{"url":"https://www.djangoproject.com/weblog/2026/mar/03/security-releases","tags":["web"]},{"url":"https://github.com/advisories/GHSA-8p8v-wh79-9r56","tags":["advisory"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-25673","tags":["advisory"]},{"url":"https://github.com/django/django/","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25673.json","tags":["advisory"]},{"url":"https://pypi.org/project/Django/","tags":["package"]},{"url":"https://github.com/django/django","tags":["package"]},{"url":"https://pypi.org/project/django","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-25673","title":"Potential denial-of-service vulnerability in URLField via Unicode normalization on Windows","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.\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.","status":"published","published":"2026-03-03T14:28:28.601Z","modified":"2026-07-15T01:16:05.116Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-400","CWE-770"],"updated_at":"2026-11-02T13:41:30.911526Z"}],"euvd":[{"id":"EUVD-2026-9294","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.\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.","status":"published","published":"2026-03-03T14:28:28Z","modified":"2026-07-15T01:16:05Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T18:19:55.318488Z"}],"ghsa":[{"id":"GHSA-8p8v-wh79-9r56","title":"Django vulnerable to Uncontrolled Resource Consumption","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.\n\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.\n\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.","status":"published","published":"2026-03-03T15:31:41Z","modified":"2026-03-05T20:31:31Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-770"],"updated_at":"2026-11-02T14:39:31.060223Z"}],"nvd":[{"id":"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.\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.","status":"published","published":"2026-03-03T15:16:19.103Z","modified":"2026-07-15T02:18:56.32Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-400","CWE-770"],"updated_at":"2026-11-02T14:12:07.420927Z"}],"osv":[{"id":"ALPINE-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.\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.","status":"published","published":"2026-03-03T15:16:19.103Z","modified":"2026-11-03T06:33:01.915610593Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T07:15:53.944853Z"},{"id":"CVE-2026-25673","title":"Potential denial-of-service vulnerability in URLField via Unicode normalization on Windows","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.\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.","status":"published","published":"2026-03-03T14:28:28.601Z","modified":"2026-10-28T02:31:14.841644469Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:44:59.438965Z"},{"id":"GHSA-8p8v-wh79-9r56","title":"Django vulnerable to Uncontrolled Resource Consumption","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.\n\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.\n\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.","status":"published","published":"2026-03-03T15:31:41Z","modified":"2026-09-10T03:50:38.233232219Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-770"],"updated_at":"2026-11-02T15:46:42.78452Z"},{"id":"PYSEC-2026-2448","title":"Django vulnerable to Uncontrolled Resource Consumption","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.\n\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.\n\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.","status":"published","published":"2026-07-13T14:36:40.418771Z","modified":"2026-07-13T16:43:46.393614233Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:55.961245Z"},{"id":"BIT-django-2026-25673","title":"Potential denial-of-service vulnerability in URLField via Unicode normalization on Windows","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.\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 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