{"id":"CVE-2011-1156","aliases":["DEBIAN-CVE-2011-1156","EUVD-2011-0014","GHSA-6h52-4vmh-8x4f","PYSEC-2011-19"],"status":"published","title":"feedparser denial of service vulnerability","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.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.03261,"percentile":0.88463,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-399"],"published":"2011-04-11T18:00:00Z","modified":"2026-10-23T17:47:36Z","fixes":[{"ecosystem":"PyPI","package":"feedparser","fixed_in":["5.0.1"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"feedparser","fixed_in":["5.0.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"feedparser","fixed_in":["5.0.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"feedparser","fixed_in":["5.0.1-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"feedparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1"},{"fixed":"5.0.1"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"feedparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"feedparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"feedparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.1-1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"feedparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1"},{"fixed":"5.0.1"}]}],"versions":["4.1","5.0"]},{"source":"osv","ecosystem":"PyPI","package":"feedparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.1"}]}],"versions":["4.1","5.0"]}],"products":[{"vendor":"mark_pilgrim","product":"feedparser"}],"references":[{"url":"http://openwall.com/lists/oss-security/2011/03/14/18","tags":["mailing-list","x_refsource_MLIST","x_transferred","Patch","fix","web"]},{"url":"http://support.novell.com/security/cve/CVE-2011-1156.html","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://secunia.com/advisories/43730","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"https://code.google.com/p/feedparser/issues/detail?id=91","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","evidence","fix","web"]},{"url":"http://www.securityfocus.com/bid/46867","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=684877","tags":["x_refsource_CONFIRM","x_transferred","report","web"]},{"url":"http://secunia.com/advisories/44074","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://openwall.com/lists/oss-security/2011/03/15/11","tags":["mailing-list","x_refsource_MLIST","x_transferred","Exploit","Patch","evidence","fix","web"]},{"url":"http://lists.opensuse.org/opensuse-updates/2011-04/msg00026.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://bugzilla.novell.com/show_bug.cgi?id=680074","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","evidence","fix","web","report"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2011:082","tags":["vendor-advisory","x_refsource_MANDRIVA","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1156","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-6h52-4vmh-8x4f","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/feedparser/PYSEC-2011-19.yaml","tags":["web"]},{"url":"https://web.archive.org/web/20150523054015/http://www.mandriva.com/en/support/security/advisories/advisory/MDVSA-2011:082/?name=MDVSA-2011:082","tags":["web"]},{"url":"https://web.archive.org/web/20210121212051/https://www.securityfocus.com/bid/46867","tags":["web"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2011-1156","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2011-1156","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.","status":"published","published":"2011-04-11T18:00:00Z","modified":"2024-08-06T22:14:27.898Z","updated_at":"2026-11-02T14:35:38.321377Z"}],"euvd":[{"id":"EUVD-2011-0014","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.","status":"published","published":"2011-04-11T18:00:00Z","modified":"2024-08-06T22:14:27Z","updated_at":"2026-11-03T01:55:58.301107Z"}],"ghsa":[{"id":"GHSA-6h52-4vmh-8x4f","title":"feedparser denial of service vulnerability","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.","status":"published","published":"2018-07-23T19:50:33Z","modified":"2024-09-20T17:28:02Z","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"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:38:04.690827Z"}],"nvd":[{"id":"CVE-2011-1156","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.","status":"published","published":"2011-04-11T18:55:03.477Z","modified":"2026-06-16T23:28:50.3Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-399"],"updated_at":"2026-11-02T14:02:07.221228Z"}],"osv":[{"id":"GHSA-6h52-4vmh-8x4f","title":"feedparser denial of service 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declaration.","status":"published","published":"2011-04-11T18:55:03Z","modified":"2026-04-10T03:41:42.554051Z","updated_at":"2026-11-02T15:43:57.991581Z"},{"id":"DEBIAN-CVE-2011-1156","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.","status":"published","published":"2011-04-11T18:55:03.477Z","modified":"2026-10-23T17:47:36.451613094Z","updated_at":"2026-11-02T15:45:24.612044Z"},{"id":"PYSEC-2011-19","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.","status":"published","published":"2011-04-11T18:55:00Z","modified":"2023-11-08T03:56:58.84644Z","updated_at":"2026-11-02T15:52:51.254177Z"}]}}