{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"pypdf","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":[],"id":"tcs_01M5NVXYDNXR89SS2S3393Q70Y","modified_at":"2026-10-06T10:00:18.877173277Z","published_at":"2026-09-01T20:17:25.027Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-84309","https://security-tracker.debian.org/tracker/CVE-2026-84309"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-84309#Debian:13/pypdf","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-84309"}],"summary":"pypdf is a free and open-source pure-python PDF library. Prior to 6.16.0, an attacker can craft a PDF whose cyclic tree structure causes pypdf/generic/_data_structures.py TreeObject.insert_child to fo"}