Apache Tomcat vulnerable to Insertion of Sensitive Information into Log File (CVE-2026-34487)

Apache Tomcat vulnerable to Insertion of Sensitive Information into Log File (CVE-2026-34487) | HOL Guard CVE

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
org.apache.tomcat.embed:tomcat-embed-coremaven	>=9.0.13 <9.0.117	9.0.117
org.apache.tomcat.embed:tomcat-embed-coremaven	>=10.1.0-M1 <10.1.54	10.1.54
org.apache.tomcat.embed:tomcat-embed-coremaven	>=11.0.0-M1 <11.0.21	11.0.21
org.apache.tomcat.embed:tomcat-embed-coremaven	>=9.0.13,<9.0.117	9.0.117
org.apache.tomcat.embed:tomcat-embed-coremaven	>=10.1.0-M1,<10.1.54	10.1.54
org.apache.tomcat.embed:tomcat-embed-coremaven	>=11.0.0-M1,<11.0.21	11.0.21
org.apache.tomcat:tomcatmaven	>=9.0.13,<9.0.117	9.0.117
org.apache.tomcat:tomcatmaven	>=10.1.0-M1,<10.1.54	10.1.54
org.apache.tomcat:tomcatmaven	>=11.0.0-M1,<11.0.21	11.0.21
org.apache.tomcat:tomcatmaven	>=9.0.13 <9.0.117	9.0.117
org.apache.tomcat:tomcatmaven	>=10.1.0-M1 <10.1.54	10.1.54
org.apache.tomcat:tomcatmaven	>=11.0.0-M1 <11.0.21	11.0.21
org.apache.tomcat:tomcat-tribesmaven	>=9.0.13,<9.0.117	9.0.117
org.apache.tomcat:tomcat-tribesmaven	>=10.1.0-M1,<10.1.54	10.1.54
org.apache.tomcat:tomcat-tribesmaven	>=11.0.0-M1,<11.0.21	11.0.21
org.apache.tomcat:tomcat-tribesmaven	>=9.0.13 <9.0.117	9.0.117
org.apache.tomcat:tomcat-tribesmaven	>=10.1.0-M1 <10.1.54	10.1.54
org.apache.tomcat:tomcat-tribesmaven	>=11.0.0-M1 <11.0.21	11.0.21

Recommended response

Check inventory. Check lockfiles and deployed manifests for org.apache.tomcat.embed:tomcat-embed-core, org.apache.tomcat.embed:tomcat-embed-core, org.apache.tomcat.embed:tomcat-embed-core.
Review the reported fix. Update org.apache.tomcat.embed:tomcat-embed-core to 9.0.117; org.apache.tomcat.embed:tomcat-embed-core to 10.1.54; org.apache.tomcat.embed:tomcat-embed-core to 11.0.21; org.apache.tomcat.embed:tomcat-embed-core to 9.0.117; org.apache.tomcat.embed:tomcat-embed-core to 10.1.54; org.apache.tomcat.embed:tomcat-embed-core to 11.0.21; org.apache.tomcat:tomcat to 9.0.117; org.apache.tomcat:tomcat to 10.1.54; org.apache.tomcat:tomcat to 11.0.21; org.apache.tomcat:tomcat to 9.0.117; org.apache.tomcat:tomcat to 10.1.54; org.apache.tomcat:tomcat to 11.0.21; org.apache.tomcat:tomcat-tribes to 9.0.117; org.apache.tomcat:tomcat-tribes to 10.1.54; org.apache.tomcat:tomcat-tribes to 11.0.21; org.apache.tomcat:tomcat-tribes to 9.0.117; org.apache.tomcat:tomcat-tribes to 10.1.54; org.apache.tomcat:tomcat-tribes to 11.0.21 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Apr 9, 2026
Evidence: source:ghsa:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:ghsa:source_dates:source-dates:record
First seen by HOL
Jun 19, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.