Apache Tomcat Incomplete Cleanup vulnerability
Incomplete Cleanup vulnerability in Apache Tomcat.
When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. Older, EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.apache.tomcat.embed:tomcat-embed-core | >= 10.1.0-M1, < 10.1.14, >= 9.0.0-M1, < 9.0.81, >= 8.5.0, < 8.5.94, >= 11.0.0-M1, < 11.0.0-M12 | 10.1.14, 9.0.81, 8.5.94, 11.0.0-M12 |
| Java / Kotlin (Maven) | org.apache.tomcat:tomcat | >= 11.0.0-M1, < 11.0.0-M12, >= 10.1.0-M1, < 10.1.14, >= 9.0.0-M1, < 9.0.81, >= 8.5.0, < 8.5.94 | 11.0.0-M12, 10.1.14, 9.0.81, 8.5.94 |
| Java / Kotlin (Maven) | org.apache.tomcat:tomcat-catalina | >= 11.0.0-M1, < 11.0.0-M12, >= 10.1.0-M1, < 10.1.14, >= 9.0.0-M1, < 9.0.81, >= 8.5.0, < 8.5.94 | 11.0.0-M12, 10.1.14, 9.0.81, 8.5.94 |
| Java / Kotlin (Maven) | org.apache.tomcat:tomcat-util | >= 11.0.0-M1, < 11.0.0-M12, >= 10.1.0-M1, < 10.1.14, >= 9.0.0-M1, < 9.0.81, >= 8.5.0, < 8.5.94 | 11.0.0-M12, 10.1.14, 9.0.81, 8.5.94 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2023-42795
- https://github.com/apache/tomcat/commit/30f8063d7a9b4c43ae4722f5e382a76af1d7a6bf
- https://github.com/apache/tomcat/commit/44d05d75d696ca10ce251e4e370511e38f20ae75
- https://github.com/apache/tomcat/commit/9375d67106f8df9eb9d7b360b2bef052fe67d3d4
- https://github.com/apache/tomcat/commit/d6db22e411307c97ddf78315c15d5889356eca38
- https://github.com/apache/tomcat
- https://lists.apache.org/thread/065jfyo583490r9j2v73nhpyxdob56lw
- https://lists.debian.org/debian-lts-announce/2023/10/msg00020.html
- https://security.netapp.com/advisory/ntap-20231103-0007
- https://www.debian.org/security/2023/dsa-5521
- https://www.debian.org/security/2023/dsa-5522
- http://www.openwall.com/lists/oss-security/2023/10/10/9
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-459- Platform
- Java / Kotlin (Maven)
- Package
org.apache.tomcat.embed:tomcat-embed-core, org.apache.tomcat:tomcat, org.apache.tomcat:tomcat-catalina- Disclosed
- 10.10.2023
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-g8pj-r55q-5c2v - CC BY 4.0
Vulnerability history: org.apache.tomcat:tomcat-util
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 05.2022 10.2023
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 2
Disclosures per year
- 2022: 2
- 2023: 2
- 2024: 0
- 2025: 0
- 2026: 0
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