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Vulnerabilities

Vulnerability · CVE-2026-26200

HDF5 is software for managing data.

Published Feb 19, 2026 · catalog updated Jul 15, 2026 · HDFGroup HDF5

Last checked Nov 12, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-26200. EPSS is 0.42%. Act only if a listed version of HDFGroup HDF5 is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.42%
Remediation
Version ranges on file
Affected products
vendor HDFGroup HDF5 < 1.14.4-2

HDF5 is software for managing data. Prior to version 1.14.4-2, an attacker who can control an 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor HDFGroup HDF5 < 1.14.4-2< 1.14.4-2

How to fix CVE-2026-26200

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-26200. EPSS is 0.42%. Act only if a listed version of HDFGroup HDF5 is installed.

Which versions are affected?

Compare what you have installed with HDFGroup HDF5 < 1.14.4-2 < 1.14.4-2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.42%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 19, 2026 · EUVD

    Detected

    HDF5 is software for managing data. Prior to version 1.14.4-2, an attacker who can control an 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 exploitabil

  2. Jul 15, 2026 · EUVD

    Updated

    HDF5 is software for managing data. Prior to version 1.14.4-2, an attacker who can control an 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 exploitabil

Sources

  • CVE.orgVulnerability recordCVE-2026-26200

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-26200

    30-day exploitation probability 0.42%

    first.org
  • EUVDVulnerability recordEUVD-2026-7979

    HDF5 is software for managing data. Prior to version 1.14.4-2, an attacker who can control an 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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 12, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 9, 2026
  • CVE.orgNov 6, 2026
  • EUVDNov 5, 2026