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 ...

EUVD-2026-76167

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: OOM DoS via Unbounded Array Allocation in SymSpellModelSerializer

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: OOM DoS via Unbounded Array Allocation in SymSpellModelSerializer

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...

PT-2026-90004

Name of the Vulnerable Software and Affected Versions Apache OpenNLP versions 2.0.0 through 2.5.11 Apache OpenNLP versions 3.0.0-M1 through 3.0.0-M5 Description Two built-in name-finder patterns in opennlp.tools.namefind.RegexNameFinderFactory specifically DEFAULT REGEX NAME FINDER.EMAIL and...

CVE-2026-82617: Inefficient Regular Expression Complexity

The two built-in name-finder patterns exposed by opennlp.tools.namefind.RegexNameFinderFactory - DEFAULTREGEXNAMEFINDER.EMAIL and DEFAULTREGEXNAMEFINDER.URL - contain ambiguous nested quantifiers. An application that obtains these finders through RegexNameFinderFactory.getDefaultRegexNameFinders...

CVE-2026-67211: Memory Allocation with Excessive Size Value

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...

PT-2026-89998

Name of the Vulnerable Software and Affected Versions Apache OpenNLP versions 3.0.0-M4 through 3.0.0-M5 Description The SymSpellModelSerializer.create method reads two 32-bit signed integer count fields, unigramCount and bigramCount, from a binary SymSpell model stream and passes them to...

CVE-2026-63317

A flaw was found in Apache OpenNLP. This vulnerability allows an attacker to achieve arbitrary class instantiation by providing a specially crafted XML feature generator descriptor within a model archive or by supplying untrusted format names. While not direct remote code execution, successful...

opennlp-1.9.5-2.1 on GA media (moderate)

opennlp-1.9.5-2.1 on GA media Announcement ID: openSUSE-SU-2026:11369-1 Rating: moderate Cross-References: CVE-2026-63317 Affected Products: openSUSE Tumbleweed An update that solves one vulnerability can now be installed. Description: These are all security issues fixed in the opennlp-1.9.5-2.1...

Linux Distros Unpatched Vulnerability : CVE-2026-63317

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Arbitrary Class Instantiation via XML Feature Generator Descriptor and Format Name in Apache OpenNLP Versions Affected: - before 2.5.10 - before 3.0.0-M5...

DEBIAN-CVE-2026-63317

Arbitrary Class Instantiation via XML Feature Generator Descriptor and Format Name in Apache OpenNLP Versions Affected: - before 2.5.10 - before 3.0.0-M5 Description: Three code paths in Apache OpenNLP load a class by its fully-qualified name via Class.forName and invoke its no-arg constructor...

CVE-2026-63317

Arbitrary Class Instantiation via XML Feature Generator Descriptor and Format Name in Apache OpenNLP Versions Affected: - before 2.5.10 - before 3.0.0-M5 Description: Three code paths in Apache OpenNLP load a class by its fully-qualified name via Class.forName and invoke its no-arg constructor...

UBUNTU-CVE-2026-63317

Arbitrary Class Instantiation via XML Feature Generator Descriptor and Format Name in Apache OpenNLP Versions Affected: - before 2.5.10 - before 3.0.0-M5 Description: Three code paths in Apache OpenNLP load a class by its fully-qualified name via Class.forName and invoke its no-arg constructor...

EUVD-2026-48529

Arbitrary Class Instantiation via XML Feature Generator Descriptor and Format Name in Apache OpenNLP Versions Affected: - before 2.5.10 - before 3.0.0-M5 Description: Three code paths in Apache OpenNLP load a class by its fully-qualified name via Class.forName and invoke its no-arg constructor...

CVE-2026-63317

Arbitrary Class Instantiation via XML Feature Generator Descriptor and Format Name in Apache OpenNLP Versions Affected: - before 2.5.10 - before 3.0.0-M5 Description: Three code paths in Apache OpenNLP load a class by its fully-qualified name via Class.forName and invoke its no-arg constructor...

CVE-2026-63317 Apache OpenNLP: Arbitrary Class Instantiation in GeneratorFactory via Feature Descriptor XML

Arbitrary Class Instantiation via XML Feature Generator Descriptor and Format Name in Apache OpenNLP Versions Affected: - before 2.5.10 - before 3.0.0-M5 Description: Three code paths in Apache OpenNLP load a class by its fully-qualified name via Class.forName and invoke its no-arg constructor...

CVE-2026-63317 Apache OpenNLP: Arbitrary Class Instantiation in GeneratorFactory via Feature Descriptor XML

Arbitrary Class Instantiation via XML Feature Generator Descriptor and Format Name in Apache OpenNLP Versions Affected: - before 2.5.10 - before 3.0.0-M5 Description: Three code paths in Apache OpenNLP load a class by its fully-qualified name via Class.forName and invoke its no-arg constructor...

CVE-2026-63317

Apache OpenNLP versions before 2.5.10 and before 3.0.0-M5 are vulnerable to arbitrary class instantiation because three code paths use Class.forName() to load classes without prior validation. Specifically, GeneratorFactory parses class names from XML descriptors in model archives, StreamFactoryR...