CVE-2026-34487

Name: CVE-2026-34487
Creator: NVD / NIST
Published: 2026-04-09T20:16:25.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.45%

Last modified Jun 17, 2026

CVE-2026-34487 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.45%

35.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-532

Affected Software

Vendor	Product	Versions
Apache	Tomcat	>= 9.0.13, < 9.0.117
Apache	Tomcat	>= 10.1.0, < 10.1.54
Apache	Tomcat	>= 11.0.0, < 11.0.21

References

https://lists.apache.org/thread/4xpkwolpkrj8v5xzp5nyovtlqp3y850hMailing List, Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/09/28Mailing List, Third Party Advisory

Timeline

Published: Apr 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-34487?

How severe is CVE-2026-34487?

CVE-2026-34487 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.

How do I fix CVE-2026-34487?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-34487?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST