CVE-2026-34734

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Source
https://cve.org/CVERecord?id=CVE-2026-34734
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34734.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-34734
Aliases
  • GHSA-w7v2-9cmr-pwwj
Downstream
Published
2026-04-09T19:01:21Z
Modified
2026-08-12T03:51:37Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
HDF5: H5T__conv_struct Use After Free
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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-416"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34734.json"
}
References

Affected packages

Git / github.com/hdfgroup/hdf5

Affected ranges

Type
GIT
Repo
https://github.com/hdfgroup/hdf5
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ac07382ca947de2b936204dc9d60ce9ac245a21f
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:hdfgroup:hdf5:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.14.1-2"
        },
        {
            "fixed": "1.14.1-2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

1.*
1.14.1
Other
before_removing_docs
before_removing_fphdf5
before_removing_mpiposix_vfd
before_removing_tbbt_code
before_signed_unsigned_changes
hdf5-1_0_0
hdf5-1_0_0-alpha2
hdf5-1_0_1
hdf5-1_13_0-rc1
hdf5-1_13_0-rc2
hdf5-1_13_0-rc3
hdf5-1_13_0-rc4
hdf5-1_13_0-rc5
hdf5-1_13_0-rc6
hdf5-1_14_1
hdf5-1_2_0
hdf5-1_2_0-beta1-update2
hdf5-1_2_0beta
hdf5-1_2_1
hdf5-1_3_0
hdf5-1_3_1
hdf5-1_4_0
hdf5-1_4_1
hdf5-1_6_0
hdf5-1_6_1
hdf5-1_6_2
hdf5-1_8_0-alpha2
hdf5-1_8_0-alpha3
hdf5-1_8_0-alpha4
hdf5-1_8_0-beta1
hdf5-1_8_0-beta2
hdf5-1_8_0-beta3
hdf5-1_8_0-beta4
hdf5-1_8_0-beta5
hdf5-1_9-start
hdff5-1_14-_0
hdff5-1_14_0
proto1
r1_1beta1
vms_last_support_trunk

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34734.json"