CVE-2026-22186 json
Bio-Formats <= 8.3.0 XXE in Leica XLEF Metadata Parser
published 2026-01-07 10 mo ago modified 2026-11-08 23 h ago also EUVD-2026-1170 , GHSA-fcqj-76g3-q7qm , GHSA-x9vc-qh97-8gjp
- cvss
- 7.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 6%
- public exploits
- 0
- none known
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.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 10 mo ago
Exploit prediction
0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- seclists.org https://seclists.org/fulldisclosure/2026/Jan/6 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 4.6 | 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 |
| GitHub | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H |
| CNA | 4.0 | 4.6 | 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 |
| NVD | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | ome:pom-bio-formats | <=8.3.0 |
no fix listed |
Affected products
- Open Microscopy Environment Bio-Formats
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
seclists.org
/fulldisclosure/2026/Jan/6
technical-description, exploit, web, mailing-list
-
github.com
/ome/bioformats/security/advisories/GHSA-x9vc-qh97-8gjp
vendor-advisory, web
-
docs.openmicroscopy.org
/bio-formats/
product, release-notes
-
vulncheck.com
/advisories/bio-formats-xxe-in-leica-xlef-metadata-parser
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-22186
advisory
-
docs.openmicroscopy.org
/bio-formats
web
-
github.com
/ome/bioformats
package
Sources
- CVE List CVE-2026-22186
- GitHub Advisory GHSA-fcqj-76g3-q7qm
- NVD CVE-2026-22186
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.