CVE-2026-42440
CVE-2026-42440: 2 tracked advisory records across Apache, Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Apache
1 advisory- Advisory severityHigh7.5
High [CVE-2026-42440] Apache OpenNLP: OOM DoS via Unbounded Array Allocation in AbstractModelReader
CVE-2026-42440Source published Source updated
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 from a binary model stream and pass that value directly to an array allocation (new String[numOutcomes], new int[numOCTypes][], new String[NUM_PREDS]) without validating that the value is non-negative or within a reasonable bound. The count is therefore fully attacker-controlled when the model file originates from an untrusted source. A crafted .bin model file in which any of these count fields is set to Integer.MAX_VALUE (or any value large enough to exhaust the available heap) triggers an…
- Affected products in this advisory
- Apache OpenNLP AbstractModelReader
- Source-reported affected versions
- Apache OpenNLP 2.0 before 2.5.9
- Apache OpenNLP 3.0.0-M1 before 3.0.0-M3
- Apache OpenNLP before 1.9.5
- Source-reported fixed versions
- 2.5.9
- 3.0.0-M3
- 1.9.5
- Mitigation guidance
- Mitigation: * 2.x users should upgrade to 2.5.9. * 3.x users should upgrade to 3.0.0-M3.
- Deployments that legitimately need to load models with more entries than the default can raise the limit at JVM startup by setting the OPENNLP_MAX_ENTRIES system property to the desired positive integer (e.g. -DOPENNLP_MAX_ENTRIES=50000000); invalid or non-positive values fall back to the default.
- Users who cannot upgrade immediately should treat all.bin model files as untrusted input unless their provenance is verified, and should avoid loading models supplied by end users or fetched from third-party repositories without integrity checks.
Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-42440] Denial of Service via unbounded array allocation in crafted model files
CVE-2026-42440Source published
Denial of Service via unbounded array allocation in crafted model files. Red Hat rates this important (CVSS 7.5). Weakness: CWE-770. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released.
- Affected products in this advisory
- Red Hat Fuse 7
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- Red Hat rates this important; a fix erratum may not be out yet — apply the RHSA as soon as it publishes.
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