Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Bio-Formats versions up to and including 8.3.0 are affected by unsafe Java deserialization of memoization cache files (.bfmemo) during image processing. An attacker who can supply a crafted .bfmemo file alongside an image can cause untrusted data to be deserialized, which may lead to denial of service, logic manipulation, or possibly remote code execution where suitable gadget chains exist on the classpath. No fix is listed.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.8 | Medium | 4.0 | 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 | CNA (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0051, the 44th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:09 UTC First seen by agentprime
- 31 Oct 2026, 15:09 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-qjm3-cvp9-3jj3
- OSV: GHSA-qjm3-cvp9-3jj3
- nvd.nist.gov/vuln/detail/CVE-2026-22187
- docs.openmicroscopy.org/bio-formats
- github.com/ome/bioformats
- seclists.org/fulldisclosure/2026/Jan/7
- www.vulncheck.com/advisories/bio-formats-memoizer-unsafe-deserialization-via-bfmemo-cache-files