RHSA-2026:93618: Security update for 3 packages

RHSA-2026:93618, released September 23, 2026, fixes 11 CVEs across 3 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent

CVEs closed

4 rated Critical

Exploited

None reported

Highest CVSS

9.8

Base score, 0 to 10

Highest EPSS

0.0272

86th percentile

Priority of the 11 CVEs

Patch now 0
                                Urgent 4
                                High 5
                                Routine 2

Fixed package versions

Product	Release	Fixed in
jws7-mod_cluster	RHEL 10	2.1.1-1.Final_redhat_00001.1.el10jws
jws7-tomcat	RHEL 10	11.0.21-10.redhat_00010.1.el10jws
jws7-tomcat-native	RHEL 10	1.3.7-4.redhat_4.el10jws

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Urgent	CVE-2026-76183	tomcat9: Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSo...	9.8	0.0057	None reported
Urgent	CVE-2026-86248	tomcat9: CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in A...	9.8	0.0050	None reported
Urgent	CVE-2026-86350	tomcat9: Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat cau...	9.1	0.0048	None reported
Urgent	CVE-2026-86246	tomcat-native: Initialization of a resource with an insecure default vulnerability in Apache Tomcat Native enabled insecure options...	9.1	0.0035	None reported
High	CVE-2026-77791	tomcat9: Uncontrolled Resource Consumption vulnerability in Apache Tomcat during sending of WebSocket close message enabled a...	7.5	0.0068	None reported
High	CVE-2026-86243	tomcat-native: Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a...	7.5	0.0056	None reported
High	CVE-2026-78383	tomcat9: Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP req...	7.5	0.0050	None reported
High	CVE-2026-79677	tomcat9: Missing release of resource after effective lifetime, Comparison using wrong factors vulnerability in Apache Tomcat a...	7.5	0.0042	None reported
High	CVE-2026-86247	tomcat-native: Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification requirem...	7.4	0.0020	None reported
Routine	CVE-2026-76166	jws7-mod_cluster: A flaw was found in mod_cluster's AdvertiseListenerImpl (org.jboss.modcluster core module)	4.3	0.0272	None reported
Routine	CVE-2026-73581	tomcat10: Improper Check for Certificate Revocation vulnerability in Apache Tomcat	6.5	0.0016	None reported

Also fixes CVE-2026-76183

ALAS2023-2026-3151
tomcat11, tomcat11-admin-webapps, tomcat11-docs-webapp and 5 more on amzn 2023
SUSE-SU-2026:4546-1
tomcat, tomcat10 on sles 15.6, sles 15.7
SUSE-SU-2026:4544-1
libtcnative-1-0, tomcat11 on sles 15.6, sles 15.7
OPENSUSE-SU-2026:21984-1
libtcnative-1-0, libtcnative-2-0, tomcat and 2 more on opensuse-leap 16.0
SUSE-SU-2026:23985-1
libtcnative-1-0, libtcnative-2-0, tomcat and 2 more on sles 16.0
ALAS2023-2026-3165
tomcat10, tomcat10-admin-webapps, tomcat10-docs-webapp and 5 more on amzn 2023
ALAS2023-2026-3166
tomcat9, tomcat9-admin-webapps, tomcat9-docs-webapp and 5 more on amzn 2023
DEBIAN-CVE-2026-76183
tomcat10, tomcat9 on Debian 12.15 (bookworm), Debian 13.5 (trixie), Debian 14

Vendor advisory

https://access.redhat.com/errata/RHSA-2026:93618

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