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BIT-tomcat-2026-78437 — Apache Tomcat: HTTP/2 DoS via malformed request

2026-10-02T21:49:01.117864+00:00

Affected: Bitnami: tomcat

Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail.

This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121.

Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

certfr-2026-avi-1218 — De multiples vulnérabilités ont été découvertes dans Apache Tomcat. Certaines d'entre elles permettent à un attaquant d…

2026-10-02T21:49:01.117941+00:00

certfr-2026-avi-1218

EUVD-2026-374267

2026-10-02T21:49:01.117971+00:00

EUVD-2026-374267

fkie_cve-2026-78437

2026-10-02T21:49:01.117991+00:00

Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail.

This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121.

Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

GHSA-hvg5-8g86-xm44

2026-10-02T21:49:01.118029+00:00

Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail.

This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121.

Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

openSUSE-SU-2026:11906-1 — tomcat-9.0.122-1.1 on GA media

2026-10-02T21:49:01.118059+00:00

tomcat-9.0.122-1.1 on GA media

RHSA-2026:68257 — Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

2026-10-02T21:49:01.118093+00:00

tomcat: Apache Tomcat: Denial of Service due to uncontrolled resource allocation tomcat: Apache Tomcat: Improper Authentication due to principal lookup failure tomcat: Apache Tomcat: TLS implementations ignore Certificate Revocation Lists tomcat: Apache Tomcat: Cross-context authentication mix-up via Jakarta Authentication misconfiguration tomcat: Apache Tomcat: Authentication Bypass in WebSocket Endpoints tomcat: Apache Tomcat: Request smuggling vulnerability can lead to denial of service tomcat: Apache Tomcat: Race condition allows HTTP/2 request manipulation tomcat: Apache Tomcat: Denial of Service via busy wait during WebSocket close tomcat: Apache Tomcat: Denial of Service via AJP request tomcat: Apache Tomcat: Denial of Service via malformed HTTP/2 request tomcat: Apache Tomcat: Denial of Service due to lost asynchronous WebSocket write timeouts tomcat: Apache Tomcat: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled tomcat: Apache Tomcat: HTTP/2 request smuggling due to header mix-up tomcat: Apache Tomcat: WebSocket message smuggling via improper length handling

UBUNTU-CVE-2026-78437

2026-10-02T21:49:01.118145+00:00

Affected: Ubuntu:Pro:14.04:LTS: tomcat6, Ubuntu:Pro:14.04:LTS: tomcat7, Ubuntu:Pro:16.04:LTS: tomcat8, Ubuntu:Pro:16.04:LTS: tomcat7, Ubuntu:Pro:18.04:LTS: tomcat8, Ubuntu:Pro:18.04:LTS: tomcat9, Ubuntu:Pro:20.04:LTS: tomcat9, Ubuntu:Pro:22.04:LTS: tomcat9, Ubuntu:24.04:LTS: tomcat10, Ubuntu:24.04:LTS: tomcat9 and 3 more

Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail. This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

WID-SEC-W-2026-3527 — Apache Tomcat: Mehrere Schwachstellen

2026-10-02T21:49:01.118209+00:00

Ein Angreifer kann mehrere Schwachstellen in Apache Tomcat ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um einen Denial of Service Angriff durchzuführen und um Daten zu manipulieren.