{"action":"Upgrade expat to 2.4.3-r0 or later.","affected":[{"fixed":"2.4.3-r0","introduced":"0"}],"component":"expat","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.17","exploited":false,"fixed_versions":["2.4.3-r0"],"id":"tcs_01M5NDJSGD6TDTQ8ZE6468WN7C","modified_at":"2026-10-23T17:17:56.230049594Z","published_at":"2022-01-01T19:15:08.030Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2021-45960","https://security.alpinelinux.org/vuln/CVE-2021-45960"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2021-45960#Alpine:v3.17/expat","url":"https://osv.dev/vulnerability/ALPINE-CVE-2021-45960"}],"summary":"In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memor"}