{"cve":"CVE-2011-4137","nvd":{"published":"2011-10-19T10:55:04.207","modified":"2026-06-16T23:34:29.663","status":"Modified","description":"The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout, which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response, (2) a completed TCP connection with no application data sent, or (3) a large amount of application data, a related issue to CVE-2011-1521.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-399"],"references":["http://openwall.com/lists/oss-security/2011/09/11/1","http://openwall.com/lists/oss-security/2011/09/13/2","http://openwall.com/lists/oss-security/2011/09/15/5","http://secunia.com/advisories/46614","http://www.debian.org/security/2011/dsa-2332"],"products":["djangoproject:django"],"source":"nvd","synced_at":"2026-10-19T19:59:31.623151214+00:00"},"epss":{"cve":"CVE-2011-4137","score":0.03024,"percentile":0.87465,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-3jqw-crqj-w8qw","url":"https://osv.dev/vulnerability/GHSA-3jqw-crqj-w8qw","summary":"Denial of service in django","modified":"2024-09-16T22:45:55.497322Z","packages":[{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":["<1.2.7"],"fixed":["1.2.7"]},{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":[">=1.3 <1.3.1"],"fixed":["1.3.1"]}]},{"id":"PYSEC-2011-2","url":"https://osv.dev/vulnerability/PYSEC-2011-2","summary":"","modified":"2023-11-08T03:57:01.258533Z","packages":[{"ecosystem":"PyPI","name":"django","purl":"pkg:pypi/django","ranges":["<1.2.7",">=1.3 <1.3.1"],"fixed":["1.2.7","1.3.1"]}]}],"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."]}