{"id":"CVE-2018-18020","details":"In QPDF 8.2.1, in libqpdf/QPDFWriter.cc, QPDFWriter::unparseObject and QPDFWriter::unparseChild have recursive calls for a long time, which allows remote attackers to cause a denial of service via a crafted PDF file.","modified":"2026-07-08T17:17:01.683767Z","published":"2018-10-06T14:29:00.660Z","references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/08/msg00037.html"},{"type":"REPORT","url":"https://github.com/qpdf/qpdf/issues/243"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/qpdf/qpdf","events":[{"introduced":"6ee761fc860fe6b22d8c46f250d09b8cfdd1986f"},{"last_affected":"6ee761fc860fe6b22d8c46f250d09b8cfdd1986f"}],"database_specific":{"cpe":"cpe:2.3:a:qpdf_project:qpdf:8.2.1:*:*:*:*:*:*:*","extracted_events":[{"introduced":"8.2.1"},{"last_affected":"8.2.1"}],"source":"CPE_STRING"}}],"versions":["8.2.1","release-qpdf-8.2.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-18020.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L"}]}