CRITICALMaven →
Apache OpenNLP ExtensionLoader Vulnerable to Arbitrary Class Instantiation via Model Manifest
Apache OpenNLP ExtensionLoader Vulnerable to Arbitrary Class Instantiation via Model Manifest
Affected packages
- org.apache.opennlp:opennlp-tools— 2.0.0 → 2.5.9
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://nvd.nist.gov/vuln/detail/CVE-2026-42027
- https://access.redhat.com/errata/RHSA-2026:65126
- https://access.redhat.com/security/cve/CVE-2026-42027
- https://bugzilla.redhat.com/show_bug.cgi?id=2466527
- https://github.com/apache/opennlp
- https://lists.apache.org/thread/ltlo4powjfc0w2w2yyl1o5tc7q1gcb2y
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42027.json
- http://www.openwall.com/lists/oss-security/2026/05/01/20
Structured record: https://osv.dev/vulnerability/GHSA-cx4m-2p55-rw7j
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