{"id":"JLSEC-2026-354","details":"HDF5 is software for managing data. In 1.14.1-2 and earlier, a heap-use-after-free was found in the h5dump helper utility. An attacker who can supply a malicious h5 file can trigger a heap use-after-free. The freed object is referenced in a memmove call from `H5T__conv_struct`. The original object was allocated by `H5D__typeinfo_init_phase3` and freed by `H5D__typeinfo_term`.","modified":"2026-07-25T18:24:20.414324438Z","published":"2026-04-29T13:21:01.555Z","upstream":["CVE-2026-34734","EUVD-2026-21020"],"database_specific":{"license":"CC-BY-4.0","sources":[{"url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34734","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34734","database_specific":{"status":"Modified"},"id":"CVE-2026-34734","imported":"2026-07-17T21:42:18.259Z","modified":"2026-07-15T02:20:34.123Z","published":"2026-04-09T20:16:25.437Z"},{"modified":"2026-06-30T12:09:10Z","published":"2026-04-09T19:01:21Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-21020","html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-21020","id":"EUVD-2026-21020","imported":"2026-07-17T21:42:26.877Z"}]},"references":[{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-34734"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2457034"},{"type":"WEB","url":"https://github.com/HDFGroup/hdf5/security/advisories/GHSA-w7v2-9cmr-pwwj"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34734.json"}],"affected":[{"package":{"name":"HDF5_jll","ecosystem":"Julia","purl":"pkg:julia/HDF5_jll?uuid=0234f1f7-429e-5d53-9886-15a909be8d59"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.14.2+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-354.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}