CVE-2026-26199

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Source
https://cve.org/CVERecord?id=CVE-2026-26199
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26199.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-26199
Aliases
  • GHSA-5c6x-jmgf-f5vc
Downstream
Published
2026-07-20T14:59:35.038Z
Modified
2026-08-12T03:51:27.225277869Z
Severity
  • 5.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Buffer underflow in `H5Iget_name `/`H5G_get_name` if size is zero
Details

HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If H5Iget_name is invoked on a group id with 0 for the size parameter, it will underflow when trying to place a null terminator in the buffer. This can occur if H5Iget_name is invoked in a way where size can be forced to zero, and there is important data before the name buffer.

Database specific 
{
    "cwe_ids": [
        "CWE-124"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26199.json",
    "cna_assigner": "GitHub_M"
}
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
24176582e5e4093f02399d726d04f25db1772fe3
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:hdfgroup:hdf5:*:*:*:*:*:*:*:*",
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.14.6"
        },
        {
            "fixed": "2.1.0"
        }
    ]
}

Affected versions

2.*
2.1.0
2.1.0-pre1test
Other
before_removing_docs
before_removing_fphdf5
before_removing_mpiposix_vfd
before_removing_tbbt_code
before_signed_unsigned_changes
final_autotools_develop
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
snapshot
vms_last_support_trunk

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26199.json"