XML External Entity Vulnerability in Apache OpenNLP by Apache
CVE-2026-40682

Currently unrated

Key Information:

Vendor

Apache
Status
Apache Opennlp
Vendor
CVE Published:
4 May 2026

What is CVE-2026-40682?

The DictionaryEntryPersistor class in Apache OpenNLP is vulnerable due to improper SAX parser configuration, enabling external entity resolution and DTD processing. This allows attackers to exploit crafted dictionary files, potentially leading to local file disclosures or server-side request forgery. Users are advised to upgrade to the latest versions for mitigation, and ensure dictionary files are from trusted sources to minimize risk.

Affected Version(s)

Apache OpenNLP 0 < 2.5.9

Apache OpenNLP 3.0 < 3.0.0-M3

References

https://lists.apache.org/thread/r6jpt0qr9nj67gqhppqg7jxf8...
vendor-advisory

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Subramanian S
.