Actively exploitedCVSS 7.5 · HIGH

CVE-2026-34486Encryption bypass in Apache Tomcat

Apache Tomcat contains a missing encryption of sensitive data vulnerability that allows the bypass of the EncryptInterceptor.

View on NVD

Analysis

Apache Tomcat presenta una vulnerabilidad que permite omitir el EncryptInterceptor, dejando datos sensibles sin cifrar durante su transmisión. Esta falla está siendo explotada activamente en ataques reales según el catálogo KEV de CISA. Se recomienda actualizar inmediatamente a las versiones 11.0.21, 10.1.54 o 9.0.117 para proteger la integridad de la información.

Relevant roles

JavaBackendCloudCyberSecurityLinuxDocker

Severity

Score: 7.5(HIGH)

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

AV: NETWORK

AC: LOW

PR: NONE

UI: NONE

S: UNCHANGED

C: HIGH

I: NONE

A: NONE

Weakness (CWE): CWE-311CWE-807

CISA KEV

Added to KEV: 2026-08-04

Federal patch deadline: 2026-08-07

Known ransomware use: Unknown

Required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

EPSS

Probability of exploitation (next 30 days): 0.4263 (42.6%)

Percentile: 98.6%

EPSS: 2026-08-04

Affects

apache:tomcatredhat:jboss_web_serverredhat:enterprise_linuxredhat:enterprise_linux_elsredhat:enterprise_linux_eusredhat:enterprise_linux_tusredhat:enterprise_linux_update_services_for_sap_solutions

Technical 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.

Published: 4/9/2026, 8:16:25 PM

Last modified: 8/4/2026, 8:09:57 PM

References

How to read this card

Actively exploited

KEV (Known Exploited Vulnerabilities) is CISA's catalog of CVEs confirmed as actively exploited in the real world. If a CVE is on KEV, someone is already using it in attacks.

CVSS 10.0

CVSS 10.0 — máxima severidad teórica. Explotable de forma remota, sin privilegios, con impacto total. Aún no confirmada como explotada en el mundo real, pero parchea ya.

AI-recommended

Un modelo de lenguaje revisó el CVE y consideró que afecta a software ampliamente desplegado o herramientas comunes de desarrollo. Un humano del equipo aprobó la publicación antes de que llegara aquí.

Categorías de impacto que evalúa la IA

widely_deployed_infra — kernel Linux, OpenSSL, glibc, k8s, Docker, nginx, OpenSSH.

popular_dev_tooling — Node.js, Python, Go, React, Next.js, librerías comunes de npm/pip.

common_consumer_software — Chrome, Firefox, Windows, macOS, apps móviles populares.

enterprise_saas — GitHub, GitLab, Atlassian, Salesforce, Cisco, Fortinet, Ivanti.

niche_software — CMS regionales, herramientas de hobby, librerías de poco uso.

not_relevant — firmware específico de proveedor, software descontinuado.

EPSS — EPSS (Exploit Prediction Scoring System) by FIRST.org estimates the probability that a CVE will be exploited in the next 30 days. Range is 0 to 1; very fresh CVEs typically score low until evidence accumulates.