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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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/6	Mailing List
https://www.vulncheck.com/advisories/bio-formats-xxe-in-leica-xlef-metadata-parser	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openmicroscopy:bio-formats:*:*:*:*:*:*:*:*

History

18 Mar 2026, 17:16

Type	Values Removed	Values Added
References		() https://github.com/ome/bioformats/security/advisories/GHSA-x9vc-qh97-8gjp -

26 Feb 2026, 23:36

Type	Values Removed	Values Added
First Time		Openmicroscopy Openmicroscopy bio-formats
CPE		cpe:2.3:a:openmicroscopy:bio-formats::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.1
References	~~() https://docs.openmicroscopy.org/bio-formats/ -~~	() https://docs.openmicroscopy.org/bio-formats/ - Release Notes
References	~~() https://seclists.org/fulldisclosure/2026/Jan/6 -~~	() https://seclists.org/fulldisclosure/2026/Jan/6 - Mailing List
References	~~() https://www.vulncheck.com/advisories/bio-formats-xxe-in-leica-xlef-metadata-parser -~~	() https://www.vulncheck.com/advisories/bio-formats-xxe-in-leica-xlef-metadata-parser - Third Party Advisory

07 Jan 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-07 21:16

Updated : 2026-03-18 17:16

NVD link : CVE-2026-22186

Mitre link : CVE-2026-22186

CVE.ORG link : CVE-2026-22186

JSON object : View

Products Affected

openmicroscopy

bio-formats

CWE

CWE-611

Improper Restriction of XML External Entity Reference

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