{"id":"ALPINE-CVE-2021-3541","details":"A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.","modified":"2025-12-03T22:48:43.900755Z","published":"2021-07-09T17:15:07.973Z","upstream":["CVE-2021-3541"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2021-3541"}],"affected":[{"package":{"name":"libxml2","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.12-r0"}]}],"versions":["2.7.2-r0","2.7.3-r0","2.7.6-r0","2.7.6-r1","2.7.6-r2","2.7.6-r3","2.7.7-r0","2.7.7-r1","2.7.7-r2","2.7.7-r3","2.7.7-r4","2.7.8-r0","2.7.8-r1","2.7.8-r2","2.7.8-r4","2.7.8-r5","2.7.8-r6","2.7.8-r7","2.7.8-r8","2.8.0-r0","2.8.0-r1","2.9.0-r0","2.9.0-r1","2.9.0-r2","2.9.0-r3","2.9.1-r0","2.9.1-r1","2.9.1-r2","2.9.10-r0","2.9.10-r1","2.9.10-r2","2.9.10-r3","2.9.10-r4","2.9.10-r5","2.9.2-r0","2.9.2-r1","2.9.2-r2","2.9.3-r0","2.9.4-r0","2.9.4-r1","2.9.4-r2","2.9.4-r3","2.9.4-r4","2.9.5-r0","2.9.6-r0","2.9.6-r2","2.9.7-r0","2.9.7-r1","2.9.8-r0","2.9.8-r1","2.9.8-r2","2.9.9-r0","2.9.9-r1","2.9.9-r2","2.9.9-r3"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-3541.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.12-r0"}]}],"versions":["2.7.2-r0","2.7.3-r0","2.7.6-r0","2.7.6-r1","2.7.6-r2","2.7.6-r3","2.7.7-r0","2.7.7-r1","2.7.7-r2","2.7.7-r3","2.7.7-r4","2.7.8-r0","2.7.8-r1","2.7.8-r2","2.7.8-r4","2.7.8-r5","2.7.8-r6","2.7.8-r7","2.7.8-r8","2.8.0-r0","2.8.0-r1","2.9.0-r0","2.9.0-r1","2.9.0-r2","2.9.0-r3","2.9.1-r0","2.9.1-r1","2.9.1-r2","2.9.10-r0","2.9.10-r1","2.9.10-r2","2.9.10-r3","2.9.10-r4","2.9.10-r5","2.9.10-r6","2.9.2-r0","2.9.2-r1","2.9.2-r2","2.9.3-r0","2.9.4-r0","2.9.4-r1","2.9.4-r2","2.9.4-r3","2.9.4-r4","2.9.5-r0","2.9.6-r0","2.9.6-r2","2.9.7-r0","2.9.7-r1","2.9.8-r0","2.9.8-r1","2.9.8-r2","2.9.9-r0","2.9.9-r1","2.9.9-r2","2.9.9-r3"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-3541.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"versions":["2.7.2-r0","2.7.3-r0","2.7.6-r0","2.7.6-r1","2.7.6-r2","2.7.6-r3","2.7.7-r0","2.7.7-r1","2.7.7-r2","2.7.7-r3","2.7.7-r4","2.7.8-r0","2.7.8-r1","2.7.8-r2","2.7.8-r4","2.7.8-r5","2.7.8-r6","2.7.8-r7","2.7.8-r8","2.8.0-r0","2.8.0-r1","2.9.0-r0","2.9.0-r1","2.9.0-r2","2.9.0-r3","2.9.1-r0","2.9.1-r1","2.9.1-r2","2.9.10-r0","2.9.10-r1","2.9.10-r2","2.9.10-r3","2.9.10-r4","2.9.10-r5","2.9.10-r6","2.9.10-r7","2.9.2-r0","2.9.2-r1","2.9.2-r2","2.9.3-r0","2.9.4-r0","2.9.4-r1","2.9.4-r2","2.9.4-r3","2.9.4-r4","2.9.5-r0","2.9.6-r0","2.9.6-r2","2.9.7-r0","2.9.7-r1","2.9.8-r0","2.9.8-r1","2.9.8-r2","2.9.9-r0","2.9.9-r1","2.9.9-r2","2.9.9-r3"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-3541.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"versions":["2.7.2-r0","2.7.3-r0","2.7.6-r0","2.7.6-r1","2.7.6-r2","2.7.6-r3","2.7.7-r0","2.7.7-r1","2.7.7-r2","2.7.7-r3","2.7.7-r4","2.7.8-r0","2.7.8-r1","2.7.8-r2","2.7.8-r4","2.7.8-r5","2.7.8-r6","2.7.8-r7","2.7.8-r8","2.8.0-r0","2.8.0-r1","2.9.0-r0","2.9.0-r1","2.9.0-r2","2.9.0-r3","2.9.1-r0","2.9.1-r1","2.9.1-r2","2.9.10-r0","2.9.10-r1","2.9.10-r2","2.9.10-r3","2.9.10-r4","2.9.10-r5","2.9.10-r6","2.9.10-r7","2.9.2-r0","2.9.2-r1","2.9.2-r2","2.9.3-r0","2.9.4-r0","2.9.4-r1","2.9.4-r2","2.9.4-r3","2.9.4-r4","2.9.5-r0","2.9.6-r0","2.9.6-r2","2.9.7-r0","2.9.7-r1","2.9.8-r0","2.9.8-r1","2.9.8-r2","2.9.9-r0","2.9.9-r1","2.9.9-r2","2.9.9-r3"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-3541.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"versions":["2.7.2-r0","2.7.3-r0","2.7.6-r0","2.7.6-r1","2.7.6-r2","2.7.6-r3","2.7.7-r0","2.7.7-r1","2.7.7-r2","2.7.7-r3","2.7.7-r4","2.7.8-r0","2.7.8-r1","2.7.8-r2","2.7.8-r4","2.7.8-r5","2.7.8-r6","2.7.8-r7","2.7.8-r8","2.8.0-r0","2.8.0-r1","2.9.0-r0","2.9.0-r1","2.9.0-r2","2.9.0-r3","2.9.1-r0","2.9.1-r1","2.9.1-r2","2.9.10-r0","2.9.10-r1","2.9.10-r2","2.9.10-r3","2.9.10-r4","2.9.10-r5","2.9.10-r6","2.9.10-r7","2.9.2-r0","2.9.2-r1","2.9.2-r2","2.9.3-r0","2.9.4-r0","2.9.4-r1","2.9.4-r2","2.9.4-r3","2.9.4-r4","2.9.5-r0","2.9.6-r0","2.9.6-r2","2.9.7-r0","2.9.7-r1","2.9.8-r0","2.9.8-r1","2.9.8-r2","2.9.9-r0","2.9.9-r1","2.9.9-r2","2.9.9-r3"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis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