{"id":"CVE-2026-102998","revision":"b5309e3a2d304d79b1723791c37bbccf","records":[{"revision":"b5309e3a2d304d79b1723791c37bbccf","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-102998","aliases":[],"title":"pypdf: Possible long runtimes when generating appearance streams","description":"pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF with form field values can cause pypdf/generic/_appearance_stream.py appearance-stream generation to repeat invariant selection-data work inside a loop when an application updates fields with flattening enabled, resulting in excessive runtimes and application unavailability. This issue is fixed in version 6.19.0.","state":0,"publishedAt":"2026-09-30T20:09:13.634+00:00","modifiedAt":"2026-09-30T20:49:30.419+00:00","affected":[{"ecosystem":"Vendor product","name":"pypdf","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"py-pdf\",\n                    \"product\": \"pypdf\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 6.19.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":8.7,"severity":"HIGH"}],"references":["https://github.com/py-pdf/pypdf/security/advisories/GHSA-php9-fj8v-98fj","https://github.com/py-pdf/pypdf/pull/4087","https://github.com/py-pdf/pypdf/commit/959467a9b95be83e2dc5ae873ece5f371263ede7","https://github.com/py-pdf/pypdf/releases/tag/6.19.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-102998","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-102998","identifiers":["CVE-2026-102998"]},"retained":false,"historicalAffected":[]}],"coverage":[]}