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CVE-2026-34486

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

HIGH
7.5
CVSS Score
Published: April 9, 2026 at 07:35 PM UTC
Updated: October 26, 2026 at 10:10 PM UTC
7 products affected across 2 vendorsEnterprise LinuxEnterprise Linux EusTomcat

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Severity
HIGH7.5
Exploitation
CISA KEV
Exploit prediction
EPSS 99%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score98.5%

EPSS (Exploit Prediction Scoring System) estimates a 98.5% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Apache Tomcat contains a missing encryption of sensitive data vulnerability that allows the bypass of the EncryptInterceptor. This vulnerability can be chained with CVE‑2025‑24813.

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.
Ransomware Use
Unknown
Added to KEV
Aug 4, 2026
Remediation Due
Aug 7, 2026
86 days overdue
Notes
https://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

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tomcat· Apache
95%
10.1.5311.0.209.0.116
Enterprise Linux· Red Hatrpm
95%
10.08.09.0
Vendor states this is fixed in 0:7.0.76-18.el7_9 (unaffected)
Vendor states this is fixed in 1:10.1.36-2.el10_0 (unaffected)
Vendor states this is fixed in 1:10.1.49-3.el10_2 (unaffected)
Vendor states this is fixed in 1:9.0.117-2.el10_2 (unaffected)
Vendor states this is fixed in 1:9.0.117-2.el9_8 (unaffected)
Vendor states this is fixed in 1:9.0.87-2.el8_10 (unaffected)
Vendor states this is fixed in 1:9.0.87-2.el8_8 (unaffected)
Vendor states this is fixed in 1:9.0.87-2.el9_2 (unaffected)
Vendor states this is fixed in 1:9.0.87-2.el9_4 (unaffected)
Vendor states this is fixed in 1:9.0.87-4.el9_6 (unaffected)
Vendor states this is fixed in 1:9.0.87-6.el10_0 (unaffected)
Vendor states this is fixed in 8 (unaffected)
Vendor states this is fixed in 6 (unknown)
Enterprise Linux Els· Red Hatrpm
95%
7.0
Enterprise Linux Eus· Red Hatrpm
95%
10.0
Enterprise Linux Tus· Red Hat
95%
8.8
Enterprise Linux Update Services for SAP Solutions· Red Hatrpm
95%
8.89.29.49.6
JBoss Web Server· Red Hat
95%
7.0.0
Vendor states this is fixed in 0:11.0.21-5.redhat_00004.1.el10jws (unaffected)
Vendor states this is fixed in 0:11.0.21-5.redhat_00004.1.el8jws (unaffected)
Vendor states this is fixed in 0:11.0.21-5.redhat_00004.1.el9jws (unaffected)
Vendor states this is fixed in 5 (unaffected)
Vendor states this is fixed in 6 (unaffected)
Vendor states this is fixed in 7.0.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (21)

Vendor AdvisoryMailing List
Source: cverecord
https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.vicarius.io/vsociety/posts/cve-2026-34486-detection-script-rce-on-apache-tomcat
MitigationThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.vicarius.io/vsociety/posts/cve-2026-34486-mitigation-script-rce-on-apache-tomcat
Third Party Advisory
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/security/cve/CVE-2026-34486
Issue TrackingThird Party Advisory
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://bugzilla.redhat.com/show_bug.cgi?id=2457027
Third Party Advisory
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34486.json
Third Party Advisory
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:36787
Third Party Advisory
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:36788

SSVC — Action Prioritization

SSVCActiveAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-311CWE-807

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