How severe is CVE-2026-22187?

CVE-2026-22187 has a CVSS 3.x base score of 7.8, 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 high, and availability high.

Is CVE-2026-22187 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22187?

CVE-2026-22187 affects Openmicroscopy Bio-formats. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22187?

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-2026-22187 have an EU (EUVD) identifier?

Yes. CVE-2026-22187 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1165.

When was CVE-2026-22187 published?

CVE-2026-22187 was published on 2026-01-07 and last updated on 2026-06-17.

CVE-2026-22187

CVE-2026-22187 is a high-severity vulnerability in Openmicroscopy Bio-formats with a CVSS 3.x base score of 7.8. 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-502.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 6.8
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1165
Weakness: CWE-502
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 perform unsafe Java deserialization of attacker-controlled memoization cache files (.bfmemo) during image processing. The loci.formats.Memoizer class automatically loads and deserializes memo files associated with images without validation, integrity checks, or trust enforcement. An attacker who can supply a crafted .bfmemo file alongside an image can trigger deserialization of untrusted data, which may result in denial of service, logic manipulation, or potentially remote code execution in environments where suitable gadget chains are present on the classpath.

Frequently asked questions

What is CVE-2026-22187?: Bio-Formats versions up to and including 8.3.0 perform unsafe Java deserialization of attacker-controlled memoization cache files (.bfmemo) during image processing. The loci.formats.Memoizer class automatically loads and deserializes memo files associated with images without validation, integrity checks, or trust enforcement. An attacker who can supply a crafted .bfmemo file alongside an image can trigger deserialization of untrusted data, which may result in denial of service, logic manipulation, or potentially remote code execution in environments where suitable gadget chains are present on the classpath.
How severe is CVE-2026-22187?: CVE-2026-22187 has a CVSS 3.x base score of 7.8, 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 high, and availability high.
Is CVE-2026-22187 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22187?: CVE-2026-22187 affects Openmicroscopy Bio-formats. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22187?: 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-2026-22187 have an EU (EUVD) identifier?: Yes. CVE-2026-22187 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1165.
When was CVE-2026-22187 published?: CVE-2026-22187 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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