{"action":"Upgrade udunits to 2.1.8-4 or later.","affected":[{"fixed":"2.1.8-4","introduced":"0"}],"component":"udunits","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["2.1.8-4"],"id":"tcs_01M5N9DAV6CV3G9SCY5TSGSYE0","modified_at":"2026-10-23T17:47:50.351766786Z","published_at":"2009-11-03T16:30:12.563Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2009-3720","https://security-tracker.debian.org/tracker/CVE-2009-3720"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2009-3720#Debian:12/udunits","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2009-3720"}],"summary":"The updatePosition function in lib/xmltok_impl.c in libexpat in Expat 2.0.1, as used in Python, PyXML, w3c-libwww, and other software, allows context-dependent attackers to cause a denial of service ("}