Disclosure summary
Incomplete Cleanup vulnerability in Apache Tomcat. The internal fork of Commons FileUpload packaged with Apache Tomcat 9.0.70 through 9.0.80 and 8.5.85 through 8.5.93 included an unreleased, in progress refactoring that exposed a potential denial of service on Windows if a web application opened a stream for an uploaded file but failed to close the stream. The file would never be deleted from disk creating the possibility of an eventual denial of service due to the disk being full. Other, EOL versions may also be affected. Users are recommended to upgrade to version 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.
Source-reported weakness categories
CWE-459
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2023-42794
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| apache | tomcat | * {"versionStartIncluding":"9.0.70","versionEndExcluding":"9.0.81"} |
Original records & references
- NIST NVD record
- CVE Program record
- lists.apache.org — Mailing List, Vendor Advisory
- lists.apache.org — Mailing List, Vendor Advisory
PUBLISHED 2023-10-10T14:15:18-04:00
MODIFIED 2026-10-08T18:17:25-04:00
INGESTED 2026-10-10T20:50:21-04:00