CVE-2026-86095CWE-787

CVE-2026-86095

High · published September 5, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
7.6
In the wild
Unconfirmed
What it is

Unidata netcdf-c through 4.10.1 contains an out-of-bounds write vulnerability in NC4_HDF5_inq_attname() that copies HDF5 attribute names into a fixed 256-byte buffer without length validation. Attackers can craft HDF5 files with oversized attribute names to overflow the destination buffer, causing memory corruption and crashes when applications enumerate attribute names.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
8.5 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00184 · 7.6th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-09-05T03:18Z
References (3)
https://github.com/Unidata/netcdf-c · [email protected]https://github.com/Unidata/netcdf-c/blob/v4.10.1/libhdf5/hdf5attr.c · [email protected]https://www.vulncheck.com/advisories/unidata-netcdf-c-through-4.10.1-out-of-bounds-write-via-oversized-hdf5-attribute-name · [email protected]
EPSS history
Timeline
  • 06 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 04 SEP 22:38Z
    Unidata netcdf-c through 4.10.1 Out-of-bounds Write via Oversized HDF5 Attribute Name
    cvelistv5