Is org.apache.opennlp:opennlp-tools affected by CVE-2026-42440?

Maven org.apache.opennlp:opennlp-tools is affected in =3.0.0-M1 <3.0.0-M3.

Is CVE-2026-42440 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

high

CVE-2026-42440

Q: Is CVE-2026-42440 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

Maven · org.apache.opennlp:opennlp-tools

Summary

Apache OpenNLP AbstractModelReader has an OOM Denial of Service via Unbounded Array Allocation

Severity: high
EPSS: 0.5% (p37)
Also known as: GHSA-659w-93r5-9j6m
Published: 2026-05-04

References

https://nvd.nist.gov/vuln/detail/CVE-2026-42440
https://github.com/apache/opennlp
https://lists.apache.org/thread/s8xlkx1gqbxfsq48py5h6jphjvgqp1jo

Related advisories

CVE-2026-42027 — critical · Maven/org.apache.opennlp:opennlp-tools
CVE-2026-40682 — critical · Maven/org.apache.opennlp:opennlp-tools

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.