Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Apache Tomcat (org.apache.tomcat:tomcat, tomcat-embed-core, tomcat-catalina and tomcat-util) is affected in versions 11.0.0-M1 through 11.0.0-M11, 10.1.0-M1 through 10.1.13, 9.0.0-M1 through 9.0.80 and 8.5.0 through 8.5.93. An error while recycling internal objects can make Tomcat skip parts of the cleanup, so information can leak from one request or response to the next. Upgrade to 11.0.0-M12, 10.1.14, 9.0.81 or 8.5.94 or later. The source says older, end-of-life versions may also be affected.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.3 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.025, the 84th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:20 UTC First seen by agentprime
- 31 Oct 2026, 14:20 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-g8pj-r55q-5c2v
- OSV: GHSA-g8pj-r55q-5c2v
- nvd.nist.gov/vuln/detail/CVE-2023-42795
- github.com/apache/tomcat/commit/30f8063d7a9b4c43ae4722f5e382a76af1d7a6bf
- github.com/apache/tomcat/commit/44d05d75d696ca10ce251e4e370511e38f20ae75
- github.com/apache/tomcat/commit/9375d67106f8df9eb9d7b360b2bef052fe67d3d4
- github.com/apache/tomcat/commit/d6db22e411307c97ddf78315c15d5889356eca38
- github.com/apache/tomcat
- lists.apache.org/thread/065jfyo583490r9j2v73nhpyxdob56lw
- lists.debian.org/debian-lts-announce/2023/10/msg00020.html
- security.netapp.com/advisory/ntap-20231103-0007
- www.debian.org/security/2023/dsa-5521
- www.debian.org/security/2023/dsa-5522
- www.openwall.com/lists/oss-security/2023/10/10/9