Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor

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Summary

CVECVE-2026-34486
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-09 20:16:25 UTC
Updated2026-08-10 13:19:04 UTC
DescriptionMissing 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from ADP

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

EPSS: 0.829330000 probability, percentile 0.996480000 (date 2026-08-21)

CISA KEV: Listed on 2026-08-04; due 2026-08-07; ransomware use Unknown

Problem Types: CWE-311 | CWE-807 | CWE-311 CWE-311 Missing Encryption of Sensitive Data | CWE-807 Reliance on Untrusted Inputs in a Security Decision

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1ADPCVSS7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

CISA Known Exploited Vulnerability

VendorApache
ProductTomcat
NameApache Tomcat Missing Encryption of Sensitive Data Vulnerability
Required ActionApply 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.
Noteshttps://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-34486

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Apache Tomcat 10.1.53 All All All
Application Apache Tomcat 11.0.20 All All All
Application Apache Tomcat 9.0.116 All All All
Operating System Redhat Enterprise Linux 10.0 All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Enterprise Linux 9.0 All All All
Operating System Redhat Enterprise Linux Els 7.0 All All All
Operating System Redhat Enterprise Linux Eus 10.0 All All All
Operating System Redhat Enterprise Linux Tus 8.8 All All All
Operating System Redhat Enterprise Linux Update Services For Sap Solutions 8.8 All All All
Operating System Redhat Enterprise Linux Update Services For Sap Solutions 9.2 All All All
Operating System Redhat Enterprise Linux Update Services For Sap Solutions 9.4 All All All
Operating System Redhat Enterprise Linux Update Services For Sap Solutions 9.6 All All All
Application Redhat Jboss Web Server 7.0.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache Tomcat affected 11.0.20 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 10.1.53 semver Not specified
CNA Apache Software Foundation Apache Tomcat affected 9.0.116 semver Not specified
ADP Red Hat Red Hat Enterprise Linux 10 unaffected 1:10.1.49-3.el10_2 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 10 unaffected 1:9.0.117-2.el10_2 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support unaffected 1:10.1.36-2.el10_0 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support unaffected 1:9.0.87-6.el10_0 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support unaffected 0:7.0.76-18.el7_9 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8 unaffected 1:9.0.87-2.el8_10 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service unaffected 1:9.0.87-2.el8_8 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions unaffected 1:9.0.87-2.el8_8 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9 unaffected 1:9.0.117-2.el9_8 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions unaffected 1:9.0.87-2.el9_2 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.4 Update Services For SAP Solutions unaffected 1:9.0.87-2.el9_4 * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support unaffected 1:9.0.87-4.el9_6 * rpm Not specified
ADP Red Hat Red Hat JBoss Web Server 7.0.0 Not specified Not specified
ADP Red Hat Red Hat JBoss Web Server 7.0 On RHEL 10 unaffected 0:11.0.21-5.redhat_00004.1.el10jws * rpm Not specified
ADP Red Hat Red Hat JBoss Web Server 7.0 On RHEL 8 unaffected 0:11.0.21-5.redhat_00004.1.el8jws * rpm Not specified
ADP Red Hat Red Hat JBoss Web Server 7.0 On RHEL 9 unaffected 0:11.0.21-5.redhat_00004.1.el9jws * rpm Not specified
ADP Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
ADP Red Hat Red Hat JBoss Web Server 5 Not specified Not specified
ADP Red Hat Red Hat JBoss Web Server 6 Not specified Not specified

References

ReferenceSourceLinkTags
www.vicarius.io/vsociety/posts/cve-2026-34486-mitigation-script-rce-on-apache... af854a3a-2127-422b-91ae-364da2661108 www.vicarius.io Mitigation, Third Party Advisory
lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly [email protected] lists.apache.org Mailing List, Vendor Advisory
access.redhat.com/errata/RHSA-2026:36877 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2026:36878 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2026:39188 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
www.vicarius.io/vsociety/posts/cve-2026-34486-detection-script-rce-on-apache-... af854a3a-2127-422b-91ae-364da2661108 www.vicarius.io Third Party Advisory
access.redhat.com/errata/RHSA-2026:36787 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34486.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2026:38505 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2026:36788 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2026:37137 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com Issue Tracking, Third Party Advisory
socradar.io/blog/snowlight-government-chinese-campaign 134c704f-9b21-4f2e-91b3-4a467353bcc0 socradar.io Third Party Advisory
access.redhat.com/errata/RHSA-2026:36790 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2026:37136 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog 134c704f-9b21-4f2e-91b3-4a467353bcc0 www.cisa.gov US Government Resource
access.redhat.com/errata/RHSA-2026:36789 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
access.redhat.com/security/cve/CVE-2026-34486 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2026:36879 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2026:36876 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2026:39189 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Vendor Comments And Credit

Discovery Credit

CNA: Bartlomiej Dmitruk at striga.ai (en)

Additional Advisory Data

SourceTimeEvent
ADP2026-04-09T20:01:26.022ZReported to Red Hat.
ADP2026-04-09T19:35:35.994ZMade public.

Solutions

ADP: RHSA-2026:39188: Red Hat JBoss Web Server 7.0 on RHEL 10, Red Hat JBoss Web Server 7.0 on RHEL 8, Red Hat JBoss Web Server 7.0 on RHEL 9

ADP: RHSA-2026:38505: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)

ADP: RHSA-2026:36787: Red Hat Enterprise Linux AppStream EUS (v. 10.0)

ADP: RHSA-2026:36789: Red Hat Enterprise Linux AppStream EUS (v. 10.0)

ADP: RHSA-2026:36788: Red Hat Enterprise Linux AppStream (v. 10)

ADP: RHSA-2026:36790: Red Hat Enterprise Linux AppStream (v. 10)

ADP: RHSA-2026:37137: Red Hat Enterprise Linux AppStream (v. 8)

ADP: RHSA-2026:37136: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)

ADP: RHSA-2026:36878: Red Hat Enterprise Linux AppStream E4S (v.9.2)

ADP: RHSA-2026:36876: Red Hat Enterprise Linux AppStream E4S (v.9.4)

ADP: RHSA-2026:36877: Red Hat Enterprise Linux AppStream EUS (v.9.6)

ADP: RHSA-2026:36879: Red Hat Enterprise Linux AppStream (v. 9)

ADP: RHSA-2026:39189: Red Hat JBoss Web Server 7.0.0

Workarounds

ADP: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

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