CVE-2026-34486KEV · OVERDUECWE-311CWE-807

Apache Tomcat Missing Encryption of Sensitive Data Vulnerability

High · published April 10, 2026

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 7.5. It is confirmed in active exploitation. It sits in the 93.8th percentile for exploit probability.

78
days past CISA
deadline
CVSS v3.1
7.5
EPSS
7%
Percentile
93.8
In the wild
Confirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.06561 · 93.8th percentile
Weaknesses
CWE-311 · Missing Encryption of Sensitive Data; CWE-807 · Reliance on Untrusted Inputs in a Security Decision
Published
2026-04-10T00:16Z
KEV added
2026-08-04 · due 2026-08-07
Affected products (14)
ProductVersionsFixed in
apache/tomcatall versions—
apache/tomcatall versions—
apache/tomcatall versions—
redhat/jboss_web_serverall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linux_elsall versions—
redhat/enterprise_linux_eusall versions—
redhat/enterprise_linux_tusall versions—
redhat/enterprise_linux_update_services_for_sap_solutionsall versions—
redhat/enterprise_linux_update_services_for_sap_solutionsall versions—
redhat/enterprise_linux_update_services_for_sap_solutionsall versions—
redhat/enterprise_linux_update_services_for_sap_solutionsall versions—
References (21)
https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly · [email protected]https://www.vicarius.io/vsociety/posts/cve-2026-34486-detection-script-rce-on-apache-tomcat · af854a3a-2127-422b-91ae-364da2661108https://www.vicarius.io/vsociety/posts/cve-2026-34486-mitigation-script-rce-on-apache-tomcat · af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2026:36787 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:36788 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:36789 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:36790 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:36876 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:36877 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:36878 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:36879 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:37136 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:37137 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:38505 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:39188 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:39189 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-34486 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2457027 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34486.json · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://socradar.io/blog/snowlight-government-chinese-campaign/ · 134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34486 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 25 SEP 03:25Z
    EPSS moved 99% → 7%
    epss
  • 09 APR 19:35Z
    Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor
    cvelistv5