CVE-2026-86350

Inconsistent interpretation of HTTP/2 requests 'HTTP Request/Response smuggling' vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from...

CVE-2026-86350

Inconsistent interpretation of HTTP/2 requests 'HTTP Request/Response smuggling' vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from...

EUVD-2026-85235

Inconsistent interpretation of HTTP/2 requests 'HTTP Request/Response smuggling' vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from...

CVE-2026-86350

Apache Tomcat is vulnerable to an HTTP Request/Response smuggling vulnerability caused by a regression in the fix for CVE-2026-41293 . This issue results in an inconsistent interpretation of HTTP/2 requests , which can trigger a request header mix-up . The vulnerability affects versions 11.0.22 t...

CVE-2026-86350 Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up

Inconsistent interpretation of HTTP/2 requests 'HTTP Request/Response smuggling' vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from...

Fixed in Apache Tomcat 10.1.60

Low: WebSocket message smuggling with per-message-deflate CVE-2026-87022 Improper handling of length parameter allows WebSocket message smuggling when per-message-deflate is used. This was fixed with commit 567a8551. This issue was reported to the Tomcat security team on 7 September 2026. The iss...

Fixed in Apache Tomcat 9.0.122

Low: WebSocket message smuggling with per-message-deflate CVE-2026-87022 Improper handling of length parameter allows WebSocket message smuggling when per-message-deflate is used. This was fixed with commit 959a52a2. This issue was reported to the Tomcat security team on 7 September 2026. The iss...

Fixed in Apache Tomcat 11.0.26

Low: WebSocket message smuggling with per-message-deflate CVE-2026-87022 Improper handling of length parameter allows WebSocket message smuggling when per-message-deflate is used. This was fixed with commit 4fef25fe. This issue was reported to the Tomcat security team on 7 September 2026. The iss...

Apache Tomcat: Request header mix-up between HTTP/2 streams

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tomcat: Apache Tomcat HTTP/2 Request mix-up

A flaw was found in Apache Tomcat. If an HTTP/2 client exceeded the agreed maximum number of concurrent streams for a connection in violation of the HTTP/2 protocol, it is possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - fro...

tomcat: Apache Tomcat HTTP/2 Request mix-up

A flaw was found in Apache Tomcat. If an HTTP/2 client exceeded the agreed maximum number of concurrent streams for a connection in violation of the HTTP/2 protocol, it is possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - fro...

openSUSE Security Update : tomcat (openSUSE-2021-81)

This update for tomcat fixes the following issue : - CVE-2020-17527: Fixed a HTTP/2 request header mix-up bsc1179602. This update was imported from the SUSE:SLE-15-SP1:Update update project. C Tenable Network Security, Inc. The descriptive text and package checks in this plugin were extracted fro...

SUSE-SU-2021:0041-1 Security update for tomcat

This update for tomcat fixes the following issue: - CVE-2020-17527: Fixed a HTTP/2 request header mix-up bsc1179602...

SUSE-SU-2021:0031-1 Security update for tomcat

This update for tomcat fixes the following issue: - CVE-2020-17527: Fixed a HTTP/2 request header mix-up bsc1179602...

CVE-2020-17527 Apache Tomcat: Request header mix-up between HTTP/2 streams

While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this...

Fixed in Apache Tomcat 9.0.40

Important: Information disclosure CVE-2021-24122 When serving resources from a network location using the NTFS file system it was possible to bypass security constraints and/or view the source code for JSPs in some configurations. The root cause was the unexpected behaviour of the JRE API...