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Description

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.

PUBLISHED Reserved 2026-01-06 | Published 2026-01-07 | Updated 2026-01-07 | Assigner VulnCheck




MEDIUM: 4.6CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

Problem types

CWE-611 Improper Restriction of XML External Entity Reference

Product status

Default status
unaffected

Any version
affected

Credits

Ron Edgerson finder

References

seclists.org/fulldisclosure/2026/Jan/6 technical-description exploit

docs.openmicroscopy.org/bio-formats/ product release-notes

www.vulncheck.com/...rmats-xxe-in-leica-xlef-metadata-parser third-party-advisory

cve.org (CVE-2026-22186)

nvd.nist.gov (CVE-2026-22186)

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