Description
Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor.
This issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116.
Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.20, 10.1.53, 9.0.116 | — |
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | tomcat +7 | 1:10.1.49-3.el10_2 | RHSA-2026:36788 |
| RHEL 10 | tomcat9 +7 | 1:9.0.117-2.el10_2 | RHSA-2026:36790 |
| RHEL 9 | tomcat +7 | 1:9.0.117-2.el9_8 | RHSA-2026:36879 |
| RHEL 8 | tomcat +7 | 1:9.0.87-2.el8_10 | RHSA-2026:37137 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | tomcat +7 | 1:10.1.36-2.el10_0 | RHSA-2026:36787 |
| RHEL 10.0 EUS | tomcat9 +7 | 1:9.0.87-6.el10_0 | RHSA-2026:36789 |
| RHEL 9.6 EUS | tomcat +7 | 1:9.0.87-4.el9_6 | RHSA-2026:36877 |
| RHEL 9.4 E4S | tomcat +7 | 1:9.0.87-2.el9_4 | RHSA-2026:36876 |
| RHEL 9.2 E4S | tomcat +7 | 1:9.0.87-2.el9_2 | RHSA-2026:36878 |
| RHEL 8.8 TUS | tomcat +7 | 1:9.0.87-2.el8_8 | RHSA-2026:37136 |
| RHEL 8.8 E4S | tomcat +7 | 1:9.0.87-2.el8_8 | RHSA-2026:37136 |
| RHEL 7 ELS | tomcat +9 | 7.0.76-18.el7_9 | RHSA-2026:38505 |
| Red Hat JBoss Web Server 7 | jws7-tomcat +9 | 11.0.21-5.redhat_00004.1.el8jws | RHSA-2026:39188 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | tomcat +7 | 1:10.1.49-3.el10_2.alma.1 | ALSA-2026:36788 |
| AlmaLinux 10 | tomcat9 +7 | 1:9.0.117-2.el10_2.alma.1 | ALSA-2026:36790 |
| AlmaLinux 9 | tomcat +7 | 1:9.0.117-2.el9_8 | ALSA-2026:36879 |
| AlmaLinux 8 | tomcat +7 | 1:9.0.87-2.el8_10 | ALSA-2026:37137 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | tomcat | 1:10.1.49-3.el10_2 | RLSA-2026:36788 |
| Rocky Linux 10 | tomcat9 | 1:9.0.117-2.el10_2 | RLSA-2026:36790 |
| Rocky Linux 9 | tomcat | 1:9.0.117-2.el9_8 | RLSA-2026:36879 |
| Rocky Linux 8 | tomcat | 1:9.0.87-2.el8_10 | RLSA-2026:37137 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | tomcat | 9.0.117-150200.105.1 | SUSE-SU-2026:1604-1 |
| SLES 15 SP7 | tomcat10 | 10.1.54-150200.5.64.1 | SUSE-SU-2026:1603-1 |
| SLES 15 SP7 | tomcat11 | 11.0.21-150600.13.18.1 | SUSE-SU-2026:1558-1 |
| SLES 15 SP6 | tomcat | 9.0.117-150200.105.1 | SUSE-SU-2026:1604-1 |
| SLES 15 SP6 | tomcat10 | 10.1.54-150200.5.64.1 | SUSE-SU-2026:1603-1 |
| SLES 15 SP6 | tomcat11 | 11.0.21-150600.13.18.1 | SUSE-SU-2026:1558-1 |
| SLES 15 SP5 | tomcat | 9.0.117-150200.105.1 | SUSE-SU-2026:1604-1 |
| SLES 15 SP5 | tomcat10 | 10.1.54-150200.5.64.1 | SUSE-SU-2026:1603-1 |
| SLES 15 SP4 | tomcat | 9.0.117-150200.105.1 | SUSE-SU-2026:1604-1 |
| SLES 12 SP5 | tomcat | 9.0.117-3.163.2 | SUSE-SU-2026:1572-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | tomcat | 9.0.117-150200.105.1 | SUSE-SU-2026:1604-1 |
| SLES for SAP 15 SP6 | tomcat10 | 10.1.54-150200.5.64.1 | SUSE-SU-2026:1603-1 |
| SLES for SAP 15 SP6 | tomcat11 | 11.0.21-150600.13.18.1 | SUSE-SU-2026:1558-1 |
| SLES for SAP 15 SP5 | tomcat | 9.0.117-150200.105.1 | SUSE-SU-2026:1604-1 |
| SLES for SAP 15 SP5 | tomcat10 | 10.1.54-150200.5.64.1 | SUSE-SU-2026:1603-1 |
| SLES for SAP 15 SP4 | tomcat | 9.0.117-150200.105.1 | SUSE-SU-2026:1604-1 |
| SLE HPC 15 SP5 | tomcat | 9.0.117-150200.105.1 | SUSE-SU-2026:1604-1 |
| SLE HPC 15 SP5 | tomcat10 | 10.1.54-150200.5.64.1 | SUSE-SU-2026:1603-1 |
| SLE HPC 15 SP4 | tomcat | 9.0.117-150200.105.1 | SUSE-SU-2026:1604-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tomcat | 9.0.117-1.1 | openSUSE-SU-2026:10547-1 |
| openSUSE Tumbleweed | tomcat10 | 10.1.54-1.1 | openSUSE-SU-2026:10548-1 |
| openSUSE Tumbleweed | tomcat11 | 11.0.21-1.1 | openSUSE-SU-2026:10549-1 |
| openSUSE Leap 16.0 | tomcat | 9.0.117-160000.1.1 | openSUSE-SU-2026:20611-1 |
| openSUSE Leap 16.0 | tomcat10 | 10.1.54-160000.1.1 | openSUSE-SU-2026:20612-1 |
| openSUSE Leap 16.0 | tomcat11 | 11.0.21-160000.1.1 | openSUSE-SU-2026:20595-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | tomcat +7 | 1:10.1.49-3.el10_2 | ELSA-2026-36788 |
| Oracle Linux 10 | tomcat9 +7 | 1:9.0.117-2.el10_2 | ELSA-2026-36790 |
| Oracle Linux 9 | tomcat +7 | 1:9.0.117-2.el9_8 | ELSA-2026-36879 |
| Oracle Linux 8 | tomcat +7 | 1:9.0.87-2.el8_10 | ELSA-2026-37137 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 5 repositories
-
striga-ai/CVE-2026-34486 ★ 70 · May 11, 2026
EncryptInterceptor fail-open bypass in Apache Tomcat Tribes clustering leading to unauthenticated RCE via Java deserialization.
-
AirSkye/CVE-2026-34486-poc ★ 12 · Apr 15, 2026
CVE-2026-34486 Apache Tomcat EncryptInterceptor 绕过漏洞复现（使用GLM5.1复现完成）
-
404-src/CVE-2026-34486 ★ 10 · Apr 15, 2026
Apache Tomcat EncryptInterceptor Bypass → Unauthenticated RCE (CVE-2026-34486)
-
CypherHippie/CVE-2026-34486---unauthenticated-RCE-via-Java-deserialization ★ 0 · Aug 19, 2026
EncryptInterceptor fail-open bypass in Apache Tomcat Tribes clustering leading to unauthenticated RCE via Java deserialization.
-
razureink/cve-2026-34486-tomcat_encrypt_bypass_reproduction ★ 0 · Jul 23, 2026
CVE Reproduction: cve-2026-34486-tomcat_encrypt_bypass_reproduction
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Apache Tomcat Tribes EncryptInterceptor Bypass - Remote Code Execution http/cves/2026/CVE-2026-34486.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.apache.tomcat:tomcat | >= 11.0.20, < 11.0.21 | 11.0.21 | GHSA-69r9-qgr7-g2wj |
| Maven | org.apache.tomcat:tomcat | >= 10.1.53, < 10.1.54 | 10.1.54 | GHSA-69r9-qgr7-g2wj |
| Maven | org.apache.tomcat:tomcat | >= 9.0.116, < 9.0.117 | 9.0.117 | GHSA-69r9-qgr7-g2wj |
| Maven | org.apache.tomcat:tomcat-tribes | >= 11.0.20, < 11.0.21 | 11.0.21 | GHSA-69r9-qgr7-g2wj |
| Maven | org.apache.tomcat:tomcat-tribes | >= 10.1.53, < 10.1.54 | 10.1.54 | GHSA-69r9-qgr7-g2wj |
| Maven | org.apache.tomcat:tomcat-tribes | >= 9.0.116, < 9.0.117 | 9.0.117 | GHSA-69r9-qgr7-g2wj |
Advisories 36
- RHSA-2026:36876 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- WID-SEC-2026-1038 Apache Tomcat und Tomcat Native: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- ALSA-2026:36790 Important: tomcat9 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:36879 Important: tomcat security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:36788 Important: tomcat security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:37137 Important: tomcat security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 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-2026:38505 Red Hat Security Advisory: tomcat security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:37137 Red Hat Security Advisory: tomcat security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:37136 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:36879 Red Hat Security Advisory: tomcat security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:36877 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:36878 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:36790 Red Hat Security Advisory: tomcat9 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:36788 Red Hat Security Advisory: tomcat security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:36789 Red Hat Security Advisory: tomcat9 security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:36787 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 30, 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
- ELSA-2026-36790 Important: tomcat9 security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- ELSA-2026-36788 Important: tomcat security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- RLSA-2026:36788 Important: tomcat security, bug fix, and enhancement update Rocky Linux Security Advisories · Jul 10, 2026
- RLSA-2026:36790 Important: tomcat9 security, bug fix, and enhancement update Rocky Linux Security Advisories · Jul 10, 2026
- RLSA-2026:36879 Important: tomcat security, bug fix, and enhancement update Rocky Linux Security Advisories · Jul 10, 2026
- RLSA-2026:37137 Important: tomcat security, bug fix, and enhancement update Rocky Linux Security Advisories · Jul 10, 2026
- ELSA-2026-37137 Important: tomcat security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 9, 2026
- ELSA-2026-36879 Important: tomcat security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 8, 2026
- SUSE-SU-2026:1604-1 Security update for tomcat SUSE / openSUSE Security Updates · Apr 25, 2026
- SUSE-SU-2026:1603-1 Security update for tomcat10 SUSE / openSUSE Security Updates · Apr 25, 2026
- openSUSE-SU-2026:20611-1 Security update for tomcat SUSE / openSUSE Security Updates · Apr 24, 2026
- openSUSE-SU-2026:20612-1 Security update for tomcat10 SUSE / openSUSE Security Updates · Apr 24, 2026
- SUSE-SU-2026:1572-1 Security update for tomcat SUSE / openSUSE Security Updates · Apr 24, 2026
- SUSE-SU-2026:1558-1 Security update for tomcat11 SUSE / openSUSE Security Updates · Apr 24, 2026
- openSUSE-SU-2026:20595-1 Security update for tomcat11 SUSE / openSUSE Security Updates · Apr 23, 2026
- openSUSE-SU-2026:10548-1 tomcat10-10.1.54-1.1 on GA media SUSE / openSUSE Security Updates · Apr 15, 2026
- openSUSE-SU-2026:10549-1 tomcat11-11.0.21-1.1 on GA media SUSE / openSUSE Security Updates · Apr 15, 2026
- openSUSE-SU-2026:10547-1 tomcat-9.0.117-1.1 on GA media SUSE / openSUSE Security Updates · Apr 15, 2026
References
- https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly vendor-advisory