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CVE-2025-55668 Apache Tomcat

Affected softwareApache Tomcat
Severity6.5 Medium CVSS 3.1
Fixed in11.0.8, 10.1.42, 9.0.106
WeaknessCWE-384
Published13 Aug 2025
Updated17 Jun 2026

Description

Session Fixation vulnerability in Apache Tomcat via rewrite valve. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.7, from 10.1.0-M1 through 10.1.41, from 9.0.0.M1 through 9.0.105. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.8, 10.1.42 or 9.0.106, which fix the issue.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. The 1 repository below are public GitHub repositories with fewer than 5 stars.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC 1 indexed, none at 5+ stars
  • EPSS 0.95% chance in 30 days

1 of these are GitHub repositories with fewer than 5 stars. They are listed for reference and don't count toward the exploitation status above.

IndexArtifactStarsFirst seen
GitHub PoC Apache Tomcat - Session fixation via rewrite valve 2025-08-13

Waratek protection

Protected by Waratek

Waratek has a rule that blocks attacks on this vulnerability.

  • Protection full
  • Action available security rule
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Protected by Waratek.

How to mitigate CVE-2025-55668

Upgrade Apache Tomcat to a release that fixes it: 11.0.8, 10.1.42 or 9.0.106. Until you can, Waratek RASP blocks exploitation with a security rule that blocks this kind of attack. It runs inside the Java application, with no code changes.

Waratek RASP Runtime protection for Java applications

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.apache.tomcat:tomcat-catalina 11.0.0-M1 11.0.8 unbounded
org.apache.tomcat:tomcat-catalina 10.1.0-M1 10.1.42 unbounded
org.apache.tomcat:tomcat-catalina 9.0.0.M1 9.0.106 unbounded
org.apache.tomcat.embed:tomcat-embed-core 11.0.0-M1 11.0.8 unbounded
org.apache.tomcat.embed:tomcat-embed-core 10.1.0-M1 10.1.42 unbounded
org.apache.tomcat.embed:tomcat-embed-core 9.0.0.M1 9.0.106 unbounded

Products and versions

3 products, 36 version entries
SourceVendorProductSchemeAffected versions
nvd apache tomcat generic 9.0.0:milestone1 · 9.0.0:milestone10 · 9.0.0:milestone11 · 9.0.0:milestone12 · 9.0.0:milestone13 · 9.0.0:milestone14 · 9.0.0:milestone15 · 9.0.0:milestone16 · 9.0.0:milestone17 · 9.0.0:milestone18 · 9.0.0:milestone19 · 9.0.0:milestone2 · 9.0.0:milestone20 · 9.0.0:milestone21 · 9.0.0:milestone22 · 9.0.0:milestone23 · 9.0.0:milestone24 · 9.0.0:milestone25 · 9.0.0:milestone26 · 9.0.0:milestone27 · 9.0.0:milestone3 · 9.0.0:milestone4 · 9.0.0:milestone5 · 9.0.0:milestone6 · 9.0.0:milestone7 · 9.0.0:milestone8 · 9.0.0:milestone9 · ≥ 9.0.1 and < 9.0.106 · ≥ 10.0.0 and < 10.1.42 · ≥ 11.0.0 and < 11.0.8
osv org.apache.tomcat tomcat-catalina generic ≥ 9.0.0 and < 9.0.106 · ≥ 10.1.0 and < 10.1.42 · ≥ 11.0.0 and < 11.0.8
osv org.apache.tomcat.embed tomcat-embed-core generic ≥ 9.0.0 and < 9.0.106 · ≥ 10.1.0 and < 10.1.42 · ≥ 11.0.0 and < 11.0.8

References

URLTags
https://github.com/apache/tomcat/commit/8621e4c6ba2c916a41eb34cb0f781171ead33fb6 WEB
https://github.com/apache/tomcat/commit/90306d971bb8b8393336d893644124fb2ca11d21 WEB
https://github.com/apache/tomcat/commit/9c3673ba04009377cb0c81ccb6cf5078aec1aa95 WEB
https://github.com/apache/tomcat PACKAGE
https://lists.apache.org/thread/v6bknr96rl7l1qxkl1c03v0qdvbbqs47 WEB
https://tomcat.apache.org/security-10.html WEB
https://tomcat.apache.org/security-11.html WEB
https://tomcat.apache.org/security-9.html WEB
http://www.openwall.com/lists/oss-security/2025/08/13/3 WEB

Timeline

Published2025-08-13By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.