Vulnerability · Published Jan 7, 2026 · Assigned by VulnCheck
CVE-2026-22187Bio-Formats <= 8.3.0 Memoizer Unsafe Deserialization via .bfmemo Cache Files
Medium 6.8
In plain English
A medium-severity unsafe deserialization in Bio-Formats from Open Microscopy Environment. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | ome:pom-bio-formats | no fix listed | GHSA-qjm3-cvp9-3jj3 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Open Microscopy Environment | Bio-Formats | 0 – through 8.3.0 |
Weakness: CWE-502 · Vector: 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
References
- https://seclists.org/fulldisclosure/2026/Jan/7 technical-description, exploit
- https://docs.openmicroscopy.org/bio-formats/ product, release-notes
- https://www.vulncheck.com/advisories/bio-formats-memoizer-unsafe-deserialization-via-bfmemo-cache-files third-party-advisory