CVE-2026-22186

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.

• CWE-611

• https://docs.openmicroscopy.org/bio-formats/Release Notes
• https://github.com/ome/bioformats/security/advisories/GHSA-x9vc-qh97-8gjp
• https://seclists.org/fulldisclosure/2026/Jan/6Mailing List
• https://www.vulncheck.com/advisories/bio-formats-xxe-in-leica-xlef-metadata-parserThird Party Advisory

Published

Jan 7, 2026

Last Modified

Jun 17, 2026

Status

Modified

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