CVE-2026-19027: HDF5 out-of-bounds heap read in N-Bit filter decompression
CSIRTS triage
- What
- Out-of-bounds heap read in N-Bit Filter decompression can leak sensitive memory.
- Who is affected
- Applications using HDF5 library to process untrusted HDF5 files with N-Bit filters.
- Urgency
- Unknown severity; insufficient details provided but out-of-bounds reads present potential information disclosure risk.
- Action
- Monitor HDF Group security advisories for patches and update HDF5 library when available.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-19027
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-190270.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-19027 | coverage & exploitation status | NVD · CVE.org |
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