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Critical RHSA-2026:56039 10 CVEs

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Published Aug 19, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 10

ReleasePackageFixed in
Red Hat · Hardened Images 1 hummingbird:1 tomcat11 1:11.0.25-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 tomcat11-admin-webapps 1:11.0.25-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 tomcat11-common 1:11.0.25-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 tomcat11-docs-webapp 1:11.0.25-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 tomcat11-el-6.0-api 1:11.0.25-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 tomcat11-jsp-4.0-api 1:11.0.25-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 tomcat11-lib 1:11.0.25-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 tomcat11-servlet-6.1-api 1:11.0.25-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 tomcat11-user-instance 1:11.0.25-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 tomcat11-webapps 1:11.0.25-0.1.hum1

Vulnerabilities 10

  • Critical 9.8
    CVE-2026-65637

    Apache Tomcat: HTTP/2 no-authority bypass of strict SNI validation - CVE-2026-32990 fix incomplete

    Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990. This issue affects Apache Tomcat: from 11.0.20 through 11.0.24, from 10.1.53 through 10.1.57, from 9.0.115 through 9.0.120. Users are recommended to upgrade to …

    Apache Software Foundation Apache Tomcat tomcat8 tomcat9 Debian Ubuntu Maven
  • Critical 9.8
    CVE-2026-65905

    Apache Tomcat: Limited replay attack possible with DIGEST authentication

    Authentication Bypass by Capture-replay vulnerability in Apache Tomcat's DIGEST authenticator. If, before windowSize requests have been made, a client makes a DIGEST authenticated request with a nonceCount on the upper boundary of the replay window then that …

    Apache Software Foundation Apache Tomcat thingsboard-tb-node thingsboard-tb-mqtt-transport Debian Ubuntu Wolfi Maven
  • Critical 9.1
    CVE-2026-65182

    Apache Tomcat: Bypass longest prefix security constraint

    Improper Access Control, Incorrect Authorization vulnerability in Apache Tomcat leads to security constraint bypass if a constraint for a longer path is specified before a more restrictive constraint for a shorter sub-path. This issue affects Apache Tomcat: f…

    Apache Software Foundation Apache Tomcat thingsboard-tb-node thingsboard-tb-mqtt-transport Debian Ubuntu Wolfi Maven
  • Critical 9.1
    CVE-2026-68525

    Apache Tomcat: Redirect after FORM auth may bypass method specific constraints

    Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing of a security constraint that limits user has access to a resource POST but not GET. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, fr…

    Apache Software Foundation Apache Tomcat thingsboard-tb-node thingsboard-tb-mqtt-transport Debian Ubuntu Wolfi Maven
  • High 8.1
    CVE-2026-65183

    Apache Tomcat: TOCTOU when setting specific permissions for Unix Domain Sockets

    Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in Apache Tomcat when creating unix domain sockets allows an unauthorised local user to access the unix domain socket. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.…

    Apache Software Foundation Apache Tomcat tomcat8 tomcat9 Debian Ubuntu
  • High 8.1
    CVE-2026-66422

    Apache Tomcat: Servlet role references can bypass declarative role constraints

    Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole(). This issue affects Apache Tomcat: from 11.0.0-…

    Apache Software Foundation Apache Tomcat tomcat8 tomcat9 Debian Ubuntu
  • High 7.5
    CVE-2026-65927

    Apache Tomcat: RewriteValve [N] restarts at the second rule and may bypass access control

    Off-by-one Error vulnerability in Apache Tomcat impacting the [N] flag on the rewrite valves causes rewrite processing to restart at the second rule rather than the first rule. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 t…

    Apache Software Foundation Apache Tomcat tomcat8 tomcat9 Debian Ubuntu
  • High 7.5
    CVE-2026-66299

    Apache Tomcat: DoS via WebSocket chat example

    Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example. This issue affects Apache Tomcat: from 11.0.0-M20 through 11.0.24, from 10.1.24 through 10.1.57, from 9.0.89 through 9.0.120. Users who have followed the security guida…

    Apache Software Foundation Apache Tomcat tomcat9 tomcat8 Debian Ubuntu
  • High 7.5
    CVE-2026-68763

    Apache Tomcat: DoS via allocation leak in HTTP/2 backlog tracking when a stream is reset

    Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2 backlog tracking when a stream is reset This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.39 through…

    Apache Software Foundation Apache Tomcat tomcat8 tomcat9 Debian Ubuntu
  • Medium 6.8
    CVE-2026-73180

    Apache Tomcat: Authenticated WebSocket session survives end of HTTP session

    Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an authenticated HTTP session was changed after a WebSocket connection had been established under that authenticated HTTP session, the WebSokcet session would not …

    Apache Software Foundation Apache Tomcat tomcat8 tomcat9 Debian Ubuntu

References

  • article
    https://images.redhat.com/
  • report
    https://access.redhat.com/security/cve/CVE-2026-66299
  • article
    https://access.redhat.com/security/updates/classification/
  • report
    https://access.redhat.com/security/cve/CVE-2026-73180
  • report
    https://access.redhat.com/security/cve/CVE-2026-65927
  • report
    https://access.redhat.com/security/cve/CVE-2026-68763
  • report
    https://access.redhat.com/security/cve/CVE-2026-65182
  • report
    https://access.redhat.com/security/cve/CVE-2026-66422
  • report
    https://access.redhat.com/security/cve/CVE-2026-65183
  • report
    https://access.redhat.com/security/cve/CVE-2026-65637
  • report
    https://access.redhat.com/security/cve/CVE-2026-68525
  • report
    https://access.redhat.com/security/cve/CVE-2026-65905
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_56039.json
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2524151
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-65182
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-65182
  • article
    https://lists.apache.org/thread/joosxvzc9b49ttj8lj0jw9mqt0ml767m
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2524153
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-65183
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-65183
  • article
    https://lists.apache.org/thread/748o4st6d5dk6n3l7tgzo5yl68gg05c0
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2524155
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-65637
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-65637
  • article
    https://lists.apache.org/thread/djog953z1ohsyt25bdvhfzbmsy22vgcj
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2524161
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-65905
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-65905
  • article
    https://lists.apache.org/thread/9v114xlpgbzrrbzz5vf9f6r2q4wnxwwj
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2524154
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-65927
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-65927
  • article
    https://lists.apache.org/thread/st1dx1zyn5y7ny2s0sscmh6lrv3worr4
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2508085
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-66299
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-66299
  • article
    https://lists.apache.org/thread/8owczcc1o8qw1rxmg9gvfk4w2jnh4l5k
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2524156
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-66422