{"id":"JLSEC-2026-380","details":"In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation.","modified":"2026-07-18T00:00:30.974659479Z","published":"2026-05-01T17:50:38.295Z","upstream":["CVE-2026-25210"],"database_specific":{"license":"CC-BY-4.0","sources":[{"html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25210","database_specific":{"status":"Modified"},"id":"CVE-2026-25210","imported":"2026-07-17T21:45:35.194Z","modified":"2026-06-17T10:24:19.123Z","published":"2026-01-30T07:16:15.570Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-25210"}]},"references":[{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/html/ssa-253495.html"},{"type":"WEB","url":"https://github.com/libexpat/libexpat/pull/1075"},{"type":"WEB","url":"https://github.com/libexpat/libexpat/pull/1075/commits/9c2d990389e6abe2e44527eeaa8b39f16fe859c7"}],"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":"2.7.5+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-380.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}