CVE-2026-34486
Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor
- Published
- Apr 9, 2026
- Updated
- Sep 21, 2026
- Assigning CNA
- apache
- Evidence observed
- Aug 4, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NLow · next 30 days
- Percentile
- 93.7%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
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.
Sources
tomcat/CVE-2026-34486
Tomcat Tribes EncryptInterceptor Bypass Remote Code Execution (CVE-2026-34486)
Vulhub vulnerability labsDeclared conditions
- lab image version: vulhub/tomcat:9.0.116(tomcat/CVE-2026-34486/docker-compose.yml:services.tomcat.image)
http/cves/2026/CVE-2026-34486.yaml
Nuclei TemplatesDeclared conditions
- verification: word($.matchers[*].type)
- oob: interactsh_reference($.template_text)
- CVE-2026-34486Exploit
Exploit for Apache Tomcat EncryptInterceptor bypass leading to unauthenticated RCE via Java deserialization on port 4000. Includes lab setup, interactive shell, and detection guidance.
CVE-2026-34486 Apache Tomcat EncryptInterceptor Bypass Vulnerability Reproduction (Reproduced Using GLM5.1)
EncryptInterceptor fail-open bypass in Apache Tomcat Tribes clustering leading to unauthenticated RCE via Java deserialization.
CVE Reproduction: cve-2026-34486-tomcat_encrypt_bypass_reproduction
EncryptInterceptor fail-open bypass in Apache Tomcat Tribes clustering leading to unauthenticated RCE via Java deserialization.
- 1day-archiveResearch
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