CVE-2026-22187

Name: CVE-2026-22187
Creator: NVD / NIST
Published: 2026-01-07T21:16:02.6+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.44%

Last modified Jun 17, 2026

CVE-2026-22187 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

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

CVSS 4.0

6.8/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/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

0.44%

35.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Openmicroscopy	Bio-Formats	<= 8.3.0

References

https://docs.openmicroscopy.org/bio-formats/Release Notes
https://seclists.org/fulldisclosure/2026/Jan/7Mailing List
https://www.vulncheck.com/advisories/bio-formats-memoizer-unsafe-deserialization-via-bfmemo-cache-filesThird Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2026-22187?

How severe is CVE-2026-22187?

CVE-2026-22187 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2026-22187?

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-2026-22187?

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

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Source: NVD / NIST