{"id":"JLSEC-2026-1236","details":"libexpat before 2.8.2 does not consider `XML_TOK_DATA_CHARS` in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219.","modified":"2026-08-09T01:30:04.128474116Z","published":"2026-08-09T01:27:54.135Z","upstream":["CVE-2026-56412"],"database_specific":{"license":"CC-BY-4.0","sources":[{"modified":"2026-06-23T15:31:30.853Z","published":"2026-06-21T17:16:44.657Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56412","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56412","database_specific":{"status":"Analyzed"},"id":"CVE-2026-56412","imported":"2026-08-09T01:17:12.028Z"}]},"references":[{"type":"WEB","url":"https://github.com/libexpat/libexpat/pull/1278"}],"affected":[{"package":{"name":"Expat_jll","ecosystem":"Julia","purl":"pkg:julia/Expat_jll?uuid=2e619515-83b5-522b-bb60-26c02a35a201"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.8.2+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1236.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","source":"NVD"}]}