Red Hat Security Advisory: tomcat security update

Fixed packages 8

Vulnerabilities 5

• Critical 9.6
  CVE-2025-55754 EPSS 10%

  Apache Tomcat: console manipulation via escape sequences in log messages

  Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache Tomcat. Tomcat did not escape ANSI escape sequences in log messages. If Tomcat was running in a console on a Windows operating system, and the console supported ANSI escape …

  Apache Software Foundation Apache Tomcat org.apache.tomcat:tomcat tomcat9 Debian Ubuntu Maven
  Oct 27, 2025
• High 7.5
  CVE-2025-31650 Public exploit EPSS 61%

  Apache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame

  Improper Input Validation vulnerability in Apache Tomcat. Incorrect error handling for some invalid HTTP priority headers resulted in incomplete clean-up of the failed request which created a memory leak. A large number of such requests could trigger an OutOf…

  Apache Software Foundation Apache Tomcat thingsboard-tb-node thingsboard-tb-mqtt-transport Debian Ubuntu Wolfi Maven
  Apr 28, 2025
• High 7.3
  CVE-2025-46701 Public exploit

  Apache Tomcat: Security constraint bypass for CGI scripts

  Improper Handling of Case Sensitivity vulnerability in Apache Tomcat's GCI servlet allows security constraint bypass of security constraints that apply to the pathInfo component of a URI mapped to the CGI servlet. This issue affects Apache Tomcat: from 11.0.0…

  Apache Software Foundation Apache Tomcat thingsboard-tb-node thingsboard-tb-mqtt-transport Debian Ubuntu Wolfi Maven
  May 29, 2025
• High 7.3
  CVE-2026-55957 Public exploit

  Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind

  Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password. This issue affects Apache Tomcat: from 11.0.0-…

  Apache Software Foundation Apache Tomcat org.apache.tomcat:tomcat tomcat8 Debian Ubuntu Maven
  Jun 29, 2026
• Medium 6.5
  CVE-2025-55668 Public exploit

  Apache Tomcat: session fixation via rewrite valve

  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 …

  Apache Software Foundation Apache Tomcat tomcat9 tomcat8 Debian Ubuntu Maven
  Aug 13, 2025

References

• article
  https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/10/html/10.2_release_notes/index
• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2369253
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2388226
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2406590
• article
  https://issues.redhat.com/browse/RHEL-150099
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_18537.json
• report
  https://access.redhat.com/security/cve/CVE-2025-31650
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2362783
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-31650
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-31650
• article
  https://lists.apache.org/thread/j6zzk0y3yym9pzfzkq5vcyxzz0yzh826
• report
  https://access.redhat.com/security/cve/CVE-2025-46701
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-46701
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-46701
• article
  https://lists.apache.org/thread/xhqqk9w5q45srcdqhogdk04lhdscv30j
• report
  https://access.redhat.com/security/cve/CVE-2025-55668
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-55668
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-55668
• article
  https://github.com/apache/tomcat/commit/8621e4c6ba2c916a41eb34cb0f781171ead33fb6
• article
  https://github.com/apache/tomcat/commit/90306d971bb8b8393336d893644124fb2ca11d21
• article
  https://github.com/apache/tomcat/commit/9c3673ba04009377cb0c81ccb6cf5078aec1aa95
• article
  https://lists.apache.org/thread/v6bknr96rl7l1qxkl1c03v0qdvbbqs47
• report
  https://access.redhat.com/security/cve/CVE-2025-55754
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-55754
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-55754
• article
  https://github.com/apache/tomcat/commit/5a3db092982c0c58d4855304167ee757fe5e79bb
• article
  https://lists.apache.org/thread/j7w54hqbkfcn0xb9xy0wnx8w5nymcbqd
• report
  https://access.redhat.com/security/cve/CVE-2026-55957
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2494669
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-55957
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-55957
• article
  https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh