CVE-2026-67211

OOM Denial of Service via Unbounded Map Pre-Sizing in Apache OpenNLP SymSpellModelSerializer Versions Affected: - 3.0.0-M4 - 3.0.0-M5 The opennlp-spellcheck extension was introduced in 3.0.0-M4. Releases 1.x and 2.x do not contain the affected code. Description: The SymSpellModelSerializer.create...

CVE-2026-67211

Apache OpenNLP versions 3.0.0-M4 and 3.0.0-M5 are vulnerable to a Denial of Service via an OutOfMemoryError in the SymSpellModelSerializer . The create() method fails to apply an upper bound to the unigramCount and bigramCount fields read from a binary SymSpell model stream, allowing an attacker ...