Medium 4.6Published Jan 7, 2026

CVE-2026-22186Bio-Formats <= 8.3.0 XXE in Leica XLEF Metadata Parser

Updated under an hour ago (2026-10-19 09:00 UTC)

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It affects Open Microscopy Environment Bio-Formats and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Open Microscopy Environment Bio-Formats

Exploited in the last 30 days

Bio-Formats versions up to and including 8.3.0 contain an XML External Entity (XXE) vulnerability in the Leica Microsystems metadata parsing component (e.g., XLEF). The parser uses an insecurely configured DocumentBuilderFactory when processing Leica XML-based metadata files, allowing external entity expansion and external DTD loading. A crafted metadata file can trigger outbound network requests (SSRF), access local system resources where readable, or cause a denial of service during XML parsing.

CVSS: 4.6 MEDIUM (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness (CWE): CWE-611
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Modified
Record last updated: Oct 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Open Microscopy Environment Bio-Formats open_microscopy_environment:bio_formats (from the name)	through 8.3.0	CNA record
openmicroscopy bio-formats openmicroscopy:bio-formats	through 8.3.0	NVD

References

https://seclists.org/fulldisclosure/2026/Jan/6technical-description, exploit
https://github.com/ome/bioformats/security/advisories/GHSA-x9vc-qh97-8gjpvendor-advisory
https://docs.openmicroscopy.org/bio-formats/product, release-notes
https://www.vulncheck.com/advisories/bio-formats-xxe-in-leica-xlef-metadata-parserthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.