CVE-2026-22186

07.01.2026, 21:16

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.

Provider	Type	Base Score	Vector
NIST	NIST	UNKNOWN	---
VulnCheck	CNA	---	---
CISA-ADP	ADP	---	---

Base Score

CVSS 3.x

EPSS Score

Percentile: 2%

Common Weakness Enumeration

CWE-611 - Improper Restriction of XML External Entity Reference
The software processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

References

https://docs.openmicroscopy.org/bio-formats/

https://seclists.org/fulldisclosure/2026/Jan/6

https://www.vulncheck.com/advisories/bio-formats-xxe-in-leica-xlef-metadata-parser