How severe is CVE-2026-22186?

CVE-2026-22186 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2026-22186 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22186?

CVE-2026-22186 affects Openmicroscopy Bio-formats. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22186?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-22186 have an EU (EUVD) identifier?

Yes. CVE-2026-22186 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1170.

When was CVE-2026-22186 published?

CVE-2026-22186 was published on 2026-01-07 and last updated on 2026-06-17.

CVE-2026-22186

CVE-2026-22186 is a high-severity vulnerability in Openmicroscopy Bio-formats with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-611.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v4: 4.6
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1170
Weakness: CWE-611
Affected product: Openmicroscopy Bio-formats
Published: 2026-01-07
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-22186?: CVE-2026-22186 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2026-22186 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22186?: CVE-2026-22186 affects Openmicroscopy Bio-formats. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22186?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-22186 have an EU (EUVD) identifier?: Yes. CVE-2026-22186 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1170.
When was CVE-2026-22186 published?: CVE-2026-22186 was published on 2026-01-07 and last updated on 2026-06-17.

References

Affected products (1)

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

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