{"cve":"CVE-2023-23969","nvd":{"published":"2023-02-01T19:15:08.763","modified":"2026-06-17T05:38:22.770","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770"],"references":["https://docs.djangoproject.com/en/4.1/releases/security/","https://groups.google.com/forum/#%21forum/django-announce","https://lists.debian.org/debian-lts-announce/2023/02/msg00000.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HWY6DQWRVBALV73BPUVBXC3QIYUM24IK/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LTZVAKU5ALQWOKFTPISE257VCVIYGFQI/"],"products":["debian:debian_linux","djangoproject:django"],"source":"nvd","synced_at":"2026-10-19T21:37:38.595364862+00:00"},"epss":{"cve":"CVE-2023-23969","score":0.47381,"percentile":0.98841,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-q2jf-h9jm-m7p4","url":"https://osv.dev/vulnerability/GHSA-q2jf-h9jm-m7p4","summary":"Django contains Uncontrolled Resource Consumption via cached header","modified":"2024-09-20T15:47:43.845538Z","packages":[{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":[">=3.2a1 <3.2.17"],"fixed":["3.2.17"]},{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":[">=4.0a1 <4.0.9"],"fixed":["4.0.9"]},{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":[">=4.1a1 <4.1.6"],"fixed":["4.1.6"]}]},{"id":"PYSEC-2023-12","url":"https://osv.dev/vulnerability/PYSEC-2023-12","summary":"","modified":"2026-06-10T17:01:02.189898268Z","packages":[{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":[">=3.2 <3.2.17",">=4.0 <4.0.9",">=4.1 <4.1.6"],"fixed":["3.2.17","4.0.9","4.1.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}