Description
Exposure of HTTP Authentication Header to unexpected hosts during WebSocket authentication vulnerability in Apache Tomcat.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.2 through 9.0.117, from 8.5.24 through 8.5.100, from 7.0.83 through 7.0.109.
Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118, which fix the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1 – ≤ 11.0.21, 10.1.0-M1 – ≤ 10.1.54, 9.0.2 – ≤ 9.0.117, 8.5.24 – ≤ 8.5.100, 7.0.83 – ≤ 7.0.109 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | tomcat10 | 10.1.55-1 | — |
| Debian 14 | tomcat11 | 11.0.22-1 | — |
| Debian 14 | tomcat9 | 9.0.70-2 | — |
| Debian 13 | tomcat10 | 10.1.55-1~deb13u1 | — |
| Debian 13 | tomcat11 | 11.0.22-1~deb13u1 | — |
| Debian 13 | tomcat9 | 9.0.70-2 | — |
| Debian 12 | tomcat10 | 10.1.55-1~deb12u1 | — |
| Debian 12 | tomcat9 | 9.0.70-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | tomcat10 | 10.1.40-1ubuntu1.26.04.1 | — |
| Ubuntu 26.04 LTS | tomcat9 | 9.0.115-1ubuntu0.1 | — |
| Ubuntu 25.10 | tomcat10 | 10.1.40-1ubuntu1.25.10.1 | — |
| Ubuntu 25.10 | tomcat11 | No fix yet | — |
| Ubuntu 25.10 | tomcat9 | 9.0.95-1ubuntu1.1 | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | tomcat11 | 11.0.18-1ubuntu0.1~esm1 | USN-8450-1 |
| Ubuntu Pro 24.04 LTS | tomcat10 | 10.1.16-1ubuntu0.1~esm4 | — |
| Ubuntu Pro 24.04 LTS | tomcat9 | 9.0.70-2ubuntu0.1+esm3 | — |
| Ubuntu Pro 22.04 LTS | tomcat9 | 9.0.58-1ubuntu0.2+esm4 | — |
| Ubuntu Pro 20.04 LTS | tomcat9 | 9.0.31-1ubuntu0.9+esm3 | — |
| Ubuntu Pro 18.04 LTS | tomcat9 | 9.0.16-3ubuntu0.18.04.2+esm8 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | tomcat +7 | 1:10.1.49-4.el10_2 | RHSA-2026:69259 |
| RHEL 10 | tomcat9 +7 | 1:9.0.120-1.el10_2 | RHSA-2026:68651 |
| RHEL 9 | tomcat +7 | 1:9.0.120-2.el9_8 | RHSA-2026:68660 |
| RHEL 8 | tomcat +7 | 1:9.0.120-1.el8_10 | RHSA-2026:68677 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | tomcat +7 | 1:10.1.49-1.el10_0 | RHSA-2026:67164 |
| RHEL 10.0 EUS | tomcat9 +7 | 1:9.0.120-1.el10_0 | RHSA-2026:67163 |
| RHEL 9.6 EUS | tomcat +7 | 1:9.0.120-1.el9_6 | RHSA-2026:68659 |
| RHEL 9.4 E4S | tomcat +7 | 1:9.0.120-1.el9_4 | RHSA-2026:68679 |
| RHEL 9.2 E4S | tomcat +7 | 1:9.0.120-1.el9_2 | RHSA-2026:68678 |
| RHEL 8.8 TUS | tomcat +7 | 1:9.0.120-1.el8_8 | RHSA-2026:68680 |
| RHEL 8.8 E4S | tomcat +7 | 1:9.0.120-1.el8_8 | RHSA-2026:68680 |
| Red Hat JBoss Web Server 7 | jws7-tomcat +9 | 11.0.21-5.redhat_00004.1.el8jws | RHSA-2026:39188 |
| Red Hat JBoss Web Server 6 | jws6-tomcat +9 | 10.1.49-15.redhat_00013.1.el8jws | RHSA-2026:43401 |
| Red Hat Hardened Images 1 | tomcat10 +9 | 10.1.55-1.hum1 | RHSA-2026:16528 |
| Red Hat Hardened Images 1 | tomcat11 +9 | 11.0.22-0.1.hum1 | RHSA-2026:13745 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | tomcat +7 | 1:10.1.49-4.el10_2.alma.1 | ALSA-2026:69259 |
| AlmaLinux 10 | tomcat9 +7 | 1:9.0.120-1.el10_2.alma.1 | ALSA-2026:68651 |
| AlmaLinux 9 | tomcat +7 | 1:9.0.120-2.el9_8 | ALSA-2026:68660 |
| AlmaLinux 8 | tomcat +7 | 1:9.0.120-1.el8_10 | ALSA-2026:68677 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | tomcat | 1:10.1.49-4.el10_2 | RLSA-2026:69259 |
| Rocky Linux 10 | tomcat9 | 1:9.0.120-1.el10_2 | RLSA-2026:68651 |
| Rocky Linux 9 | tomcat | 1:9.0.120-2.el9_8 | RLSA-2026:68660 |
| Rocky Linux 8 | tomcat | 1:9.0.120-1.el8_10 | RLSA-2026:68677 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | tomcat | 9.0.118-150200.108.1 | SUSE-SU-2026:2675-1 |
| SLES 15 SP7 | tomcat10 | 10.1.55-150200.5.67.1 | SUSE-SU-2026:2377-1 |
| SLES 15 SP7 | tomcat11 | 11.0.22-150600.13.21.1 | SUSE-SU-2026:2374-1 |
| SLES 15 SP6 | tomcat | 9.0.118-150200.108.1 | SUSE-SU-2026:2675-1 |
| SLES 15 SP6 | tomcat10 | 10.1.55-150200.5.67.1 | SUSE-SU-2026:2377-1 |
| SLES 15 SP6 | tomcat11 | 11.0.22-150600.13.21.1 | SUSE-SU-2026:2374-1 |
| SLES 15 SP5 | tomcat | 9.0.118-150200.108.1 | SUSE-SU-2026:2675-1 |
| SLES 15 SP5 | tomcat10 | 10.1.55-150200.5.67.1 | SUSE-SU-2026:2377-1 |
| SLES 15 SP4 | tomcat | 9.0.118-150200.108.1 | SUSE-SU-2026:2675-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | tomcat | 9.0.118-160000.1.1 | SUSE-SU-2026:22195-1 |
| SLES for SAP 16.0 | tomcat10 | 10.1.55-160000.1.1 | SUSE-SU-2026:22197-1 |
| SLES for SAP 16.0 | tomcat11 | 11.0.22-160000.1.1 | SUSE-SU-2026:22196-1 |
| SLES for SAP 15 SP6 | tomcat | 9.0.118-150200.108.1 | SUSE-SU-2026:2675-1 |
| SLES for SAP 15 SP6 | tomcat10 | 10.1.55-150200.5.67.1 | SUSE-SU-2026:2377-1 |
| SLES for SAP 15 SP6 | tomcat11 | 11.0.22-150600.13.21.1 | SUSE-SU-2026:2374-1 |
| SLES for SAP 15 SP5 | tomcat | 9.0.118-150200.108.1 | SUSE-SU-2026:2675-1 |
| SLES for SAP 15 SP5 | tomcat10 | 10.1.55-150200.5.67.1 | SUSE-SU-2026:2377-1 |
| SLES for SAP 15 SP4 | tomcat | 9.0.118-150200.108.1 | SUSE-SU-2026:2675-1 |
| SLES 16.0 | tomcat | 9.0.118-160000.1.1 | SUSE-SU-2026:22195-1 |
| SLES 16.0 | tomcat10 | 10.1.55-160000.1.1 | SUSE-SU-2026:22197-1 |
| SLES 16.0 | tomcat11 | 11.0.22-160000.1.1 | SUSE-SU-2026:22196-1 |
| SLE HPC 15 SP5 | tomcat | 9.0.118-150200.108.1 | SUSE-SU-2026:2675-1 |
| SLE HPC 15 SP5 | tomcat10 | 10.1.55-150200.5.67.1 | SUSE-SU-2026:2377-1 |
| SLE HPC 15 SP4 | tomcat | 9.0.118-150200.108.1 | SUSE-SU-2026:2675-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tomcat | 9.0.118-1.1 | openSUSE-SU-2026:10925-1 |
| openSUSE Tumbleweed | tomcat10 | 10.1.55-1.1 | openSUSE-SU-2026:10926-1 |
| openSUSE Tumbleweed | tomcat11 | 11.0.22-1.1 | openSUSE-SU-2026:10927-1 |
| openSUSE Leap 16.0 | tomcat | 9.0.118-160000.1.1 | openSUSE-SU-2026:21117-1 |
| openSUSE Leap 16.0 | tomcat10 | 10.1.55-160000.1.1 | openSUSE-SU-2026:21122-1 |
| openSUSE Leap 16.0 | tomcat11 | 11.0.22-160000.1.1 | openSUSE-SU-2026:21121-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | tomcat10 +7 | 1:10.1.55-1.amzn2023.0.1 | ALAS2023-2026-1776 |
| Amazon Linux 2023 | tomcat9 +7 | 1:9.0.118-1.amzn2023.0.1 | ALAS2023-2026-1770 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | tomcat +7 | 1:10.1.49-4.el10_2 | ELSA-2026-69259 |
| Oracle Linux 10 | tomcat9 +7 | 1:9.0.120-1.el10_2 | ELSA-2026-68651 |
| Oracle Linux 9 | tomcat +7 | 1:9.0.120-2.el9_8 | ELSA-2026-68660 |
| Oracle Linux 8 | tomcat +7 | 1:9.0.120-1.el8_10 | ELSA-2026-68677 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | thingsboard-tb-node +1 | 4.3.1.2-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.apache.tomcat:tomcat | < 9.0.118 | 9.0.118 | GHSA-fv25-8xcx-gqjc |
| Maven | org.apache.tomcat:tomcat | >= 10.1.0-M1, < 10.1.55 | 10.1.55 | GHSA-fv25-8xcx-gqjc |
| Maven | org.apache.tomcat:tomcat | >= 11.0.0-M1, < 11.0.22 | 11.0.22 | GHSA-fv25-8xcx-gqjc |
| Maven | org.apache.tomcat:tomcat-catalina | < 9.0.118 | 9.0.118 | GHSA-fv25-8xcx-gqjc |
| Maven | org.apache.tomcat:tomcat-catalina | >= 10.1.0-M1, < 10.1.55 | 10.1.55 | GHSA-fv25-8xcx-gqjc |
| Maven | org.apache.tomcat:tomcat-catalina | >= 11.0.0-M1, < 11.0.22 | 11.0.22 | GHSA-fv25-8xcx-gqjc |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | < 9.0.118 | 9.0.118 | GHSA-fv25-8xcx-gqjc |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 10.1.0-M1, < 10.1.55 | 10.1.55 | GHSA-fv25-8xcx-gqjc |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 11.0.0-M1, < 11.0.22 | 11.0.22 | GHSA-fv25-8xcx-gqjc |
Advisories 44
- WID-SEC-2026-2455 Oracle Solaris Drittanbieterkomponenten: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- WID-SEC-2026-1514 Apache Tomcat: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- ALSA-2026:68660 Moderate: tomcat security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:68651 Moderate: tomcat9 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:69259 Moderate: tomcat update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:68677 Important: tomcat security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:69259 Red Hat Security Advisory: tomcat update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:68680 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:68678 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:68679 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:68677 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:68659 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:68660 Red Hat Security Advisory: tomcat security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:68651 Red Hat Security Advisory: tomcat9 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:67163 Red Hat Security Advisory: tomcat9 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:67164 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:43401 Red Hat Security Advisory: Red Hat JBoss Web Server 6.2.4 release and security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:39188 Red Hat Security Advisory: Red Hat JBoss Web Server 7.0.0 security release Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2026:16528 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2026:13745 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- WID-SEC-2026-1955 Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira und Jira Service Management: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 23, 2026
- RLSA-2026:69259 Moderate: tomcat update Rocky Linux Security Advisories · Sep 22, 2026
- ELSA-2026-69259 Moderate: tomcat update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Sep 21, 2026
- RLSA-2026:68651 Moderate: tomcat9 security update Rocky Linux Security Advisories · Sep 19, 2026
- RLSA-2026:68660 Moderate: tomcat security, bug fix, and enhancement update Rocky Linux Security Advisories · Sep 19, 2026
- RLSA-2026:68677 Important: tomcat security update Rocky Linux Security Advisories · Sep 19, 2026
- ELSA-2026-68651 Moderate: tomcat9 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Sep 18, 2026
- ELSA-2026-68660 Moderate: tomcat security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Sep 17, 2026
- ELSA-2026-68677 Important: tomcat security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 17, 2026
- openSUSE-SU-2026:21121-1 Security update for tomcat11 SUSE / openSUSE Security Updates · Jun 30, 2026
- openSUSE-SU-2026:21122-1 Security update for tomcat10 SUSE / openSUSE Security Updates · Jun 30, 2026
- openSUSE-SU-2026:21117-1 Security update for tomcat SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:2675-1 Security update for tomcat SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:22196-1 Security update for tomcat11 SUSE / openSUSE Security Updates · Jun 24, 2026
- SUSE-SU-2026:22197-1 Security update for tomcat10 SUSE / openSUSE Security Updates · Jun 24, 2026
- SUSE-SU-2026:22195-1 Security update for tomcat SUSE / openSUSE Security Updates · Jun 24, 2026
- USN-8450-1 tomcat11 vulnerabilities Ubuntu Security Notices (USN) · Jun 18, 2026
- SUSE-SU-2026:2374-1 Security update for tomcat11 SUSE / openSUSE Security Updates · Jun 12, 2026
- SUSE-SU-2026:2377-1 Security update for tomcat10 SUSE / openSUSE Security Updates · Jun 12, 2026
- ALAS2023-2026-1776 Important: tomcat10 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 8, 2026
- openSUSE-SU-2026:10925-1 tomcat-9.0.118-1.1 on GA media SUSE / openSUSE Security Updates · Jun 2, 2026
- openSUSE-SU-2026:10926-1 tomcat10-10.1.55-1.1 on GA media SUSE / openSUSE Security Updates · Jun 2, 2026
- openSUSE-SU-2026:10927-1 tomcat11-11.0.22-1.1 on GA media SUSE / openSUSE Security Updates · Jun 2, 2026
- ALAS2023-2026-1770 Important: tomcat9 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 25, 2026
References
- https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb vendor-advisory