{"id":"CVE-2023-23969","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-23969","generatedAt":"2026-11-04T23:49:50.713Z","title":"This leads to a potential denial-of-service vector via excessive memory usage if the raw value of Accept-Language headers is very large.","description":"In Django 3.2 before 3.2.17, 4.0 before 4.0.9, and 4.1 before 4.1.6, the parsed values of Accept-Language headers are cached in order to avoid repetitive parsing. This leads to a potential denial-of-service vector via excessive memory usage if the raw value of Accept-Language headers is very large.","published":"2023-02-01T19:15:09.000Z","lastModified":"2026-06-17T05:38:23.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-770"],"affected":["djangoproject/django","debian/debian linux"],"epss":{"score":0.47381,"percentile":0.98843,"date":"2026-11-03","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 47.4%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://docs.djangoproject.com/en/4.1/releases/security/","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://groups.google.com/forum/#%21forum/django-announce","source":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2023/02/msg00000.html","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HWY6DQWRVBALV73BPUVBXC3QIYUM24IK/","source":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LTZVAKU5ALQWOKFTPISE257VCVIYGFQI/","source":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20230302-0007/","source":"cve@mitre.org"},{"url":"https://www.djangoproject.com/weblog/2023/feb/01/security-releases/","tags":["Release Notes","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://docs.djangoproject.com/en/4.1/releases/security/","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://groups.google.com/forum/#%21forum/django-announce","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2023/02/msg00000.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HWY6DQWRVBALV73BPUVBXC3QIYUM24IK/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LTZVAKU5ALQWOKFTPISE257VCVIYGFQI/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20230302-0007/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.djangoproject.com/weblog/2023/feb/01/security-releases/","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-23969","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}