{"cve":"CVE-2011-1156","nvd":{"published":"2011-04-11T18:55:03.477","modified":"2026-06-16T23:28:50.300","status":"Modified","description":"feedparser.py in Universal Feed Parser (aka feedparser or python-feedparser) before 5.0.1 allows remote attackers to cause a denial of service (application crash) via a malformed DOCTYPE declaration.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-399"],"references":["http://lists.opensuse.org/opensuse-updates/2011-04/msg00026.html","http://openwall.com/lists/oss-security/2011/03/14/18","http://openwall.com/lists/oss-security/2011/03/15/11","http://secunia.com/advisories/43730","http://secunia.com/advisories/44074"],"products":["mark_pilgrim:feedparser"],"source":"nvd","synced_at":"2026-10-19T19:58:50.521460154+00:00"},"epss":{"cve":"CVE-2011-1156","score":0.03261,"percentile":0.88376,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-6h52-4vmh-8x4f","url":"https://osv.dev/vulnerability/GHSA-6h52-4vmh-8x4f","summary":"feedparser denial of service vulnerability","modified":"2024-09-20T17:44:51.499377Z","packages":[{"ecosystem":"PyPI","name":"feedparser","purl":"pkg:pypi/feedparser","ranges":[">=4.1 <5.0.1"],"fixed":["5.0.1"]}]},{"id":"PYSEC-2011-19","url":"https://osv.dev/vulnerability/PYSEC-2011-19","summary":"","modified":"2023-11-08T03:56:58.846440Z","packages":[{"ecosystem":"PyPI","name":"feedparser","purl":"pkg:pypi/feedparser","ranges":["<5.0.1"],"fixed":["5.0.1"]}]}],"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."]}