OSV-2026-86 Security exception in java.base/java.util.Arrays.copyOfRange
A security exception in Apache POI's image processing can cause a denial of service when parsing malicious files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2026-86?
OSV-2026-86 is a denial of service vulnerability in apache-poi, published on 18 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=476431399
Crash type: Security exception
Crash state:
java.base/java.util.Arrays.copyOfRange
org.apache.poi.util.IOUtils.safelyClone
org.apache.poi.ddf.EscherBlipRecord.setPictureData
Which versions are affected by OSV-2026-86?
1 open source package ship an affected version, including apache-poi.
| Package | Affected | Fixed in |
|---|---|---|
apache-poi OSS-Fuzz | All versions | None |
How do I fix OSV-2026-86?
No fix has been published for OSV-2026-86 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is OSV-2026-86 being exploited?
There is no known exploitation of OSV-2026-86 in the wild and no public exploit code.