{"cve":"CVE-2026-34734","nvd":{"published":"2026-04-09T20:16:25.437","modified":"2026-10-26T21:10:00.170","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-416","CWE-825"],"references":["https://github.com/HDFGroup/hdf5/security/advisories/GHSA-w7v2-9cmr-pwwj","https://access.redhat.com/security/cve/CVE-2026-34734","https://bugzilla.redhat.com/show_bug.cgi?id=2457034","https://github.com/HDFGroup/hdf5/security/advisories/GHSA-w7v2-9cmr-pwwj","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34734.json"],"products":["hdfgroup:hdf5"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-34734","score":0.00193,"percentile":0.08877,"date":"2026-10-26"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}