CVE-2026-26200

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Source
https://cve.org/CVERecord?id=CVE-2026-26200
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26200.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-26200
Aliases
  • GHSA-5p2m-j456-9mr2
Downstream
Published
2026-02-19T19:19:10.512Z
Modified
2026-02-22T01:54:32.017019Z
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 Affected by H5T__conv_struct_opt Heap Buffer Overflow
Details

HDF5 is software for managing data. Prior to version 1.14.4-2, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition. This can lead to a denial-of-service condition, and potentially further issues such as remote code execution depending on the practical exploitability of the heap overflow against modern operating systems. Real-world exploitability of this issue in terms of remote-code execution is currently unknown. Version 1.14.4-2 fixes the issue.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26200.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
f0ecc8bc26972119fb31b1cd548ea23fff4a3227

Affected versions

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_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
proto1
r1_1beta1
vms_last_support_trunk
hdf5_1.*
hdf5_1.14.4
hdf5_1.14.4.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26200.json"