PT-2026-20919 · Hdf5 · Hdf5

Denandz · Published 2026-01-01 · Updated 2026-02-23 · CVE-2026-26200

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions HDF5 versions prior to 1.14.4-2

Description HDF5 is software used for managing data. An attacker controlling an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow. This can lead to a denial-of-service condition, and potentially remote code execution depending on exploitability against modern operating systems. The real-world exploitability of remote code execution is currently unknown.

Recommendations Update to version 1.14.4-2 or later.

Exploit

Fix

Heap Based Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-122

CWE-787

Related Identifiers

CVE-2026-26200

ECHO-A777-BF3C-CF20

GHSA-5P2M-J456-9MR2

Affected Products

Hdf5

References · 10

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26200.json · Exploit
• 🔥 https://github.com/HDFGroup/hdf5/security/advisories/GHSA-5p2m-j456-9mr2 · Exploit
• https://cve.org/CVERecord?id=CVE-2026-26200 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-26200 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-26200 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-26200 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-26200 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-26200 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-26200 · Security Note
• https://twitter.com/CVEnew/status/2025809096411386362 · Twitter Post