CVE-2026-22186

Name: CVE-2026-22186
Creator: NVD / NIST
Published: 2026-01-07T21:16:02.433+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.6/10EPSS 0.14%

Last modified Jun 17, 2026

CVE-2026-22186 is a medium-severity vulnerability rated 4.6/10 on the CVSS scale. 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. EPSS estimates a 0.14% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.1/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

CVSS 4.0

4.6/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.14%

3.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-611

Affected Software

Vendor	Product	Versions
Openmicroscopy	Bio-Formats	<= 8.3.0

References

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

Timeline

Published: Jan 7, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2026-22186?

How severe is CVE-2026-22186?

CVE-2026-22186 has a CVSS score of 4.6/10 (MEDIUM severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.

How do I fix CVE-2026-22186?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-22186?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST