CVE-2026-42440

OOM Denial of Service via Unbounded Array Allocation in Apache OpenNLP AbstractModelReader Versions Affected: before 1.9.5 before 2.5.9 before 3.0.0-M3 Description: The AbstractModelReader methods getOutcomes, getOutcomePatterns, and getPredicates each read a 32-bit signed integer count field...

CVE-2026-42440

Apache OpenNLP is vulnerable to an Out-of-Memory (OOM) Denial of Service in the AbstractModelReader component. The methods getOutcomes(), getOutcomePatterns(), and getPredicates() read a 32-bit signed integer count from a binary model stream and pass it directly to array allocations without valid...

CVE-2026-42440 Apache OpenNLP: OOM DoS via Unbounded Array Allocation in AbstractModelReader

OOM Denial of Service via Unbounded Array Allocation in Apache OpenNLP AbstractModelReader Versions Affected: before 1.9.5 before 2.5.9 before 3.0.0-M3 Description: The AbstractModelReader methods getOutcomes, getOutcomePatterns, and getPredicates each read a 32-bit signed integer count field...

CVE-2026-42440

OOM Denial of Service via Unbounded Array Allocation in Apache OpenNLP AbstractModelReader Versions Affected: before 1.9.5 before 2.5.9 before 3.0.0-M3 Description: The AbstractModelReader methods getOutcomes, getOutcomePatterns, and getPredicates each read a 32-bit signed integer count field...

EUVD-2026-27031

OOM Denial of Service via Unbounded Array Allocation in Apache OpenNLP AbstractModelReader Versions Affected: before 2.5.9 before 3.0.0-M3 Description: The AbstractModelReader methods getOutcomes, getOutcomePatterns, and getPredicates each read a 32-bit signed integer count field from a binary...

Apache OpenNLP security vulnerabilities

Apache OpenNLP is a natural language processing toolkit developed by the Apache Foundation. There is a security vulnerability in Apache OpenNLP, which stems from AbstractModelReader not verifying whether the counts in array assignments are non-negative or within a reasonable range. This could lea...

CVE-2026-42440: Memory Allocation with Excessive Size Value

OOM Denial of Service via Unbounded Array Allocation in Apache OpenNLP AbstractModelReader Versions Affected: before 1.9.5 before 2.5.9 before 3.0.0-M3 Description: The AbstractModelReader methods getOutcomes, getOutcomePatterns, and getPredicates each read a 32-bit signed integer count field...