{"action":"Upgrade w3m to 0.5.3+git20230121-2.1 or later.","affected":[{"fixed":"0.5.3+git20230121-2.1","introduced":"0"}],"component":"w3m","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["0.5.3+git20230121-2.1"],"id":"tcs_01M5NJ9A8619S9EX044VC0FW0Q","modified_at":"2026-10-23T18:05:16.845839541Z","published_at":"2023-12-21T16:15:10.017Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2023-4255","https://security-tracker.debian.org/tracker/CVE-2023-4255"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2023-4255#Debian:13/w3m","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2023-4255"}],"summary":"An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability is triggered by supplying a specially cra"}