Read the docs
TI-2026-17796 Aliases CVE-2026-22186GHSA-fcqj-76g3-q7qm

Bio-Formats <= 8.3.0 XXE in Leica XLEF Metadata Parser

Priority MEDIUM 54CWE-611Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · None · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00173 6th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Open Microscopy EnvironmentBio-Formatsup to 8.3.0—No fix listedCNA
—ome:pom-bio-formats (Maven)up to 8.3.0—No fix listedGHSA-fcqj-76g3-q7qm
  • Bio-Formats VendorOpen Microscopy Environment Affected up to 8.3.0 Fixed in — No fix listed CNA
  • ome:pom-bio-formats (Maven) Vendor— Affected up to 8.3.0 Fixed in — No fix listed GHSA-fcqj-76g3-q7qm

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openmicroscopy:bio-formats:*:*:*:*:*:*:*:*up to 8.3.0Vulnerableome
  • cpe:2.3:a:openmicroscopy:bio-formats:*:*:*:*:*:*:*:* Versions up to 8.3.0 Vulnerable ·ome

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-22186
  2. 2026-10-03 Alias added: GHSA-fcqj-76g3-q7qm

References

Exploit 1

Advisory 2

Other 3

  • TI-2026-17797 Bio-Formats <= 8.3.0 Memoizer Unsafe Deserialization via .bfmemo Cache Files CVSS 4.0MEDIUM 6.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences