Apache Tomcat: Cloud membership for clustering component exposed the Kubernetes bearer token
Priority LOW 39CWE-532Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 13 fixed, 6 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-532.
Summary
Insertion of Sensitive Information into Log File vulnerability in the cloud membership for clustering component of Apache Tomcat exposed the Kubernetes bearer token. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.13 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00455 39th percentileScored 2026-11-07
Fix Partial org.apache.tomcat:tomcat-tribes (Maven): 9.0.117, 10.1.54, 11.0.21org.apache.tomcat:tomcat (Maven): 9.0.117, 10.1.54, 11.0.21+1 more productRed Hat: 10 advisoriesRed Hat: 13 fixed, 6 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache Tomcat | 11.0.0-M1 – 11.0.20; 10.1.0-M1 – 10.1.53; 9.0.13 – 9.0.116 | — | No fix listed | CNA |
| — | org.apache.tomcat:tomcat-tribes (Maven) | 9.0.13 to before 9.0.117 | 9.0.117 | Patch available | GHSA-x4m4-345f-5h5g |
| — | org.apache.tomcat:tomcat-tribes (Maven) | 10.1.0-M1 to before 10.1.54 | 10.1.54 | Patch available | GHSA-x4m4-345f-5h5g |
| — | org.apache.tomcat:tomcat-tribes (Maven) | 11.0.0-M1 to before 11.0.21 | 11.0.21 | Patch available | GHSA-x4m4-345f-5h5g |
| — | org.apache.tomcat:tomcat (Maven) | 9.0.13 to before 9.0.117 | 9.0.117 | Patch available | GHSA-x4m4-345f-5h5g |
| — | org.apache.tomcat:tomcat (Maven) | 10.1.0-M1 to before 10.1.54 | 10.1.54 | Patch available | GHSA-x4m4-345f-5h5g |
| — | org.apache.tomcat:tomcat (Maven) | 11.0.0-M1 to before 11.0.21 | 11.0.21 | Patch available | GHSA-x4m4-345f-5h5g |
| — | org.apache.tomcat.embed:tomcat-embed-core (Maven) | 9.0.13 to before 9.0.117 | 9.0.117 | Patch available | GHSA-x4m4-345f-5h5g |
| — | org.apache.tomcat.embed:tomcat-embed-core (Maven) | 10.1.0-M1 to before 10.1.54 | 10.1.54 | Patch available | GHSA-x4m4-345f-5h5g |
| — | org.apache.tomcat.embed:tomcat-embed-core (Maven) | 11.0.0-M1 to before 11.0.21 | 11.0.21 | Patch available | GHSA-x4m4-345f-5h5g |
- Apache Tomcat VendorApache Affected 11.0.0-M1 – 11.0.20; 10.1.0-M1 – 10.1.53; 9.0.13 – 9.0.116 Fixed in — No fix listed CNA
- org.apache.tomcat:tomcat-tribes (Maven) Vendor— Affected 9.0.13 to before 9.0.117 Fixed in 9.0.117 Patch available GHSA-x4m4-345f-5h5g
- org.apache.tomcat:tomcat-tribes (Maven) Vendor— Affected 10.1.0-M1 to before 10.1.54 Fixed in 10.1.54 Patch available GHSA-x4m4-345f-5h5g
- org.apache.tomcat:tomcat-tribes (Maven) Vendor— Affected 11.0.0-M1 to before 11.0.21 Fixed in 11.0.21 Patch available GHSA-x4m4-345f-5h5g
- org.apache.tomcat:tomcat (Maven) Vendor— Affected 9.0.13 to before 9.0.117 Fixed in 9.0.117 Patch available GHSA-x4m4-345f-5h5g
- org.apache.tomcat:tomcat (Maven) Vendor— Affected 10.1.0-M1 to before 10.1.54 Fixed in 10.1.54 Patch available GHSA-x4m4-345f-5h5g
- org.apache.tomcat:tomcat (Maven) Vendor— Affected 11.0.0-M1 to before 11.0.21 Fixed in 11.0.21 Patch available GHSA-x4m4-345f-5h5g
- org.apache.tomcat.embed:tomcat-embed-core (Maven) Vendor— Affected 9.0.13 to before 9.0.117 Fixed in 9.0.117 Patch available GHSA-x4m4-345f-5h5g
- org.apache.tomcat.embed:tomcat-embed-core (Maven) Vendor— Affected 10.1.0-M1 to before 10.1.54 Fixed in 10.1.54 Patch available GHSA-x4m4-345f-5h5g
- org.apache.tomcat.embed:tomcat-embed-core (Maven) Vendor— Affected 11.0.0-M1 to before 11.0.21 Fixed in 11.0.21 Patch available GHSA-x4m4-345f-5h5g
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* | 9.0.13 to before 9.0.117; 10.1.0 to before 10.1.54; 11.0.0 to before 11.0.21 | Vulnerable | Apache |
- cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* Versions 9.0.13 to before 9.0.117; 10.1.0 to before 10.1.54; 11.0.0 to before 11.0.21 Vulnerable ·Apache
Remediation
- Fix · GHSA-x4m4-345f-5h5g org.apache.tomcat:tomcat-tribes (Maven) Fixed in 9.0.117 Advisory →
- Fix · GHSA-x4m4-345f-5h5g org.apache.tomcat:tomcat-tribes (Maven) Fixed in 10.1.54 Advisory →
- Fix · GHSA-x4m4-345f-5h5g org.apache.tomcat:tomcat-tribes (Maven) Fixed in 11.0.21 Advisory →
- Fix · GHSA-x4m4-345f-5h5g org.apache.tomcat:tomcat (Maven) Fixed in 9.0.117 Advisory →
- Fix · GHSA-x4m4-345f-5h5g org.apache.tomcat:tomcat (Maven) Fixed in 10.1.54 Advisory →
- Fix · GHSA-x4m4-345f-5h5g org.apache.tomcat:tomcat (Maven) Fixed in 11.0.21 Advisory →
- Fix · GHSA-x4m4-345f-5h5g org.apache.tomcat.embed:tomcat-embed-core (Maven) Fixed in 9.0.117 Advisory →
- Fix · GHSA-x4m4-345f-5h5g org.apache.tomcat.embed:tomcat-embed-core (Maven) Fixed in 10.1.54 Advisory →
- Fix · GHSA-x4m4-345f-5h5g org.apache.tomcat.embed:tomcat-embed-core (Maven) Fixed in 11.0.21 Advisory →
Red Hat 10 advisories
- RHSA-2026:68677 Released 2026-09-17 · Red Hat rating Importanttomcat security update
- Red Hat Enterprise Linux AppStream (v. 8) tomcat-1:9.0.120-1.el8_10, tomcat-admin-webapps-1:9.0.120-1.el8_10, tomcat-docs-webapp-1:9.0.120-1.el8_10 +5
- RHSA-2026:68659 Released 2026-09-17 · Red Hat rating Importanttomcat security update
- Red Hat Enterprise Linux AppStream EUS (v.9.6) tomcat-1:9.0.120-1.el9_6, tomcat-admin-webapps-1:9.0.120-1.el9_6, tomcat-docs-webapp-1:9.0.120-1.el9_6 +5
- RHSA-2026:68678 Released 2026-09-17 · Red Hat rating Importanttomcat security update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) tomcat-1:9.0.120-1.el9_2, tomcat-admin-webapps-1:9.0.120-1.el9_2, tomcat-docs-webapp-1:9.0.120-1.el9_2 +5
Show 7 more Red Hat advisories
- RHSA-2026:68679 Released 2026-09-17 · Red Hat rating Importanttomcat security update
- Red Hat Enterprise Linux AppStream E4S (v.9.4) tomcat-1:9.0.120-1.el9_4, tomcat-admin-webapps-1:9.0.120-1.el9_4, tomcat-docs-webapp-1:9.0.120-1.el9_4 +5
- RHSA-2026:68680 Released 2026-09-17 · Red Hat rating Importanttomcat security update
- Red Hat Enterprise Linux AppStream E4S (v.8.8) tomcat-1:9.0.120-1.el8_8, tomcat-admin-webapps-1:9.0.120-1.el8_8, tomcat-docs-webapp-1:9.0.120-1.el8_8 +5
- Red Hat Enterprise Linux AppStream TUS (v.8.8) tomcat-1:9.0.120-1.el8_8, tomcat-admin-webapps-1:9.0.120-1.el8_8, tomcat-docs-webapp-1:9.0.120-1.el8_8 +5
- RHSA-2026:67163 Released 2026-09-14 · Red Hat rating Importanttomcat9 security update
- Red Hat Enterprise Linux AppStream EUS (v. 10.0) tomcat9-1:9.0.120-1.el10_0, tomcat9-admin-webapps-1:9.0.120-1.el10_0, tomcat9-docs-webapp-1:9.0.120-1.el10_0 +5
- RHSA-2026:26323 Released 2026-06-16 · Red Hat rating Importanttomcat security update
- Red Hat Enterprise Linux AppStream (v. 9) tomcat-1:9.0.117-1.el9_8, tomcat-admin-webapps-1:9.0.117-1.el9_8, tomcat-docs-webapp-1:9.0.117-1.el9_8 +5
- RHSA-2026:25341 Released 2026-06-11 · Red Hat rating Importanttomcat9 security update
- Red Hat Enterprise Linux AppStream (v. 10) tomcat9-1:9.0.117-1.el10_2, tomcat9-admin-webapps-1:9.0.117-1.el10_2, tomcat9-docs-webapp-1:9.0.117-1.el10_2 +5
- RHSA-2026:20405 Released 2026-05-26 · Red Hat rating ImportantRed Hat JBoss Web Server 6.2.3 release and security update
- Red Hat JBoss Web Server 6.2 on RHEL 10 jws6-tomcat-10.1.49-13.redhat_00011.1.el10jws, jws6-tomcat-admin-webapps-10.1.49-13.redhat_00011.1.el10jws, jws6-tomcat-docs-webapp-10.1.49-13.redhat_00011.1.el10jws +7
- Red Hat JBoss Web Server 6.2 on RHEL 8 jws6-tomcat-10.1.49-13.redhat_00011.1.el8jws, jws6-tomcat-admin-webapps-10.1.49-13.redhat_00011.1.el8jws, jws6-tomcat-docs-webapp-10.1.49-13.redhat_00011.1.el8jws +7
- Red Hat JBoss Web Server 6.2 on RHEL 9 jws6-tomcat-10.1.49-13.redhat_00011.1.el9jws, jws6-tomcat-admin-webapps-10.1.49-13.redhat_00011.1.el9jws, jws6-tomcat-docs-webapp-10.1.49-13.redhat_00011.1.el9jws +7
- RHSA-2026:20406 Released 2026-05-26 · Red Hat rating ImportantRed Hat JBoss Web Server 6.2.3 release and security update
- Red Hat JBoss Web Server 6.2.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat JBoss Web Server 5 | Affected | — |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:25341 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2026:68677 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:26323 |
| Red Hat Enterprise Linux AppStream E4S (v.8.8) | Fixed | RHSA-2026:68680 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2026:68678 |
| Red Hat Enterprise Linux AppStream E4S (v.9.4) | Fixed | RHSA-2026:68679 |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Fixed | RHSA-2026:67163 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2026:68659 |
| Red Hat Enterprise Linux AppStream TUS (v.8.8) | Fixed | RHSA-2026:68680 |
| Red Hat JBoss Web Server 6.2 on RHEL 10 | Fixed | RHSA-2026:20405 |
| Red Hat JBoss Web Server 6.2 on RHEL 8 | Fixed | RHSA-2026:20405 |
| Red Hat JBoss Web Server 6.2 on RHEL 9 | Fixed | RHSA-2026:20405 |
| Red Hat JBoss Web Server 6.2.3 | Fixed | RHSA-2026:20406 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-34487
- 2026-10-03 Alias added: GHSA-x4m4-345f-5h5g
- 2026-10-09 Fix available: RHSA-2026:20406 · Red Hat
- 2026-11-06 Fix available: Red Hat JBoss Web Server 6.2.3 · Red Hat
References
Advisory 3
Other 7
- https://github.com/apache/tomcat/commit/301bc6efbf72feb14dacfdfa3f50372182736150
- https://github.com/apache/tomcat/commit/5eff2a773b8b728083e5195b3183df1b9e12a03d
- https://github.com/apache/tomcat/commit/f593292a082e5ef9336a8db2b4b522f7f3e36976
- https://github.com/apache/tomcat
- https://tomcat.apache.org/security-10.html
- https://tomcat.apache.org/security-11.html
- https://tomcat.apache.org/security-9.html
More Apache Tomcat vulnerabilities
- TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
- TI-2020-01862 Improper privilege management in Apache Tomcat KEVCVSS 3.1CRITICAL 9.8
- TI-2016-07192 Improper access control in Apache Tomcat KEVCVSS 3.1CRITICAL 9.8
- TI-2017-09342 Unrestricted file upload in Apache Tomcat KEVCVSS 3.1HIGH 8.1
- TI-2017-09340 Unrestricted file upload in Apache Tomcat KEVCVSS 3.1HIGH 8.1
- TI-2026-26741 Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor KEVCVSS 3.1HIGH 7.5
Sources
- CVE-2026-34487 · CVE Program
- CVE-2026-34487 · NVD
- FIRST EPSS
- GHSA-x4m4-345f-5h5g · GitHub Advisory Database · CC BY 4.0
- CVE-2026-34487 · Red Hat security data · CC BY 4.0
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