{"action":"Upgrade squid to 4.11-1 or later.","affected":[{"fixed":"4.11-1","introduced":"0"}],"component":"squid","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["4.11-1"],"id":"tcs_01M5NDRD1RSTGRWSJTYYAT1JMA","modified_at":"2026-09-21T07:02:16.259049684Z","published_at":"2020-04-15T20:15:13.473Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2019-12519","https://security-tracker.debian.org/tracker/CVE-2019-12519"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2019-12519#Debian:14/squid","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2019-12519"}],"summary":"An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression wh"}