{"action":"Upgrade php8.4 to 8.4.26-1 or later.","affected":[{"fixed":"8.4.26-1","introduced":"0"}],"component":"php8.4","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["8.4.26-1"],"id":"tcs_01M5NWMMBVHGHP43FN692J8905","modified_at":"2026-10-11T17:01:15.597159605Z","published_at":"2026-09-25T22:18:49.807Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-91768","https://security-tracker.debian.org/tracker/CVE-2026-91768"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-91768#Debian:14/php8.4","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-91768"}],"summary":"The IPv6 branch of the FastCGI client access check compares only the first 12 bytes of a 16-byte IPv6 address, so listen.allowed_clients matches on a /96 prefix instead of the exact address. An attack"}