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CVE-2026-120756VulnerabilityPublished

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Affects Red HatSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-120756· Low 1.9

Public exploit available · CVSS 1.9 Low : upgrade Red Hat hdf5 to 2.3.0 as a priority.

Data as of 4 Nov 2026, 06:30 UTC

CVSS 4.0 base score
1.9Low
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (HDFG)CVSS 4.01.9
Patch
Available – fixed in 2.3.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CVSS exploit maturity: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

What to do

Upgrade HDF5 and hdfgroup/hdf5 to 2.3.0.

Affected software

ProductAffectedFixed in
The HDF GroupHDF5Affected
  • <2.3.0
Fixed in
  • 2.3.0
GitHubhdfgroup/hdf5pkg:github/hdfgroup/hdf5Other threatsAffected
  • <2.3.0
Fixed in
  • 2.3.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This update includes the following RPMs: hdf5: * hdf5-2.2.0-0.1.5.hum1 (aarch64, s390x, x86_64) * hdf5-devel-2.2.0-0.1.5.hum1 (aarch64, s390x, x86_64) * hdf5-mpich-2.2.0-0.1.5.hum1 (aarch64, s390x, x86_64) * hdf5-mpich-devel-2.2.0-0.1.5.hum1 (aarch64, s390x, x86_64) * hdf5-mpich-static-2.2.0-0.1.5.hum1 (aarch64, s390x, x86_64) * hdf5-openmpi-2.2.0-0.1.5.hum1 (aarch64, s390x, x86_64) * hdf5-openmpi-devel-2.2.0-0.1.5.hum1 (aarch64, s390x, x86_64) * hdf5-openmpi-static-2.2.0-0.1.5.hum1 (aarch64, s390x, x86_64) * hdf5-static-2.2.0-0.1.5.hum1 (aarch64, s390x, x86_64) * java-hdf5-2.2.0-0.1.5.hum1 (aarch64, s390x, x86_64) * hdf5-2.2.0-0.1.5.hum1.src (src) Security Fix(es): hdf5: * CVE-2026-120756 * CVE-2026-120758 * CVE-2026-120757

References

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