CVE-2026-34486 (GCVE-0-2026-34486)
Vulnerability from cvelistv5 – Published: 2026-04-09 19:35 – Updated: 2026-08-05 13:42Title
Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor
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.
Severity
9.8 (Critical)
7.5 (High)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
21 references
Impacted products
22 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.20
(semver)
Affected: 10.1.53 (semver) Affected: 9.0.116 (semver) |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
1:10.1.49-3.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
1:9.0.117-2.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
1:10.1.36-2.el10_0 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
1:9.0.87-6.el10_0 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support |
Unaffected:
0:7.0.76-18.el7_9 , < *
(rpm)
cpe:/o:redhat:rhel_els:7 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
1:9.0.87-2.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
1:9.0.87-2.el8_8 , < *
(rpm)
cpe:/a:redhat:rhel_tus:8.8 |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
1:9.0.87-2.el8_8 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
1:9.0.117-2.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
1:9.0.87-2.el9_2 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2 |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
1:9.0.87-2.el9_4 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
1:9.0.87-4.el9_6 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat JBoss Web Server 7.0.0 |
cpe:/a:redhat:jboss_enterprise_web_server:7.0 |
|
| Red Hat | Red Hat JBoss Web Server 7.0 on RHEL 10 |
Unaffected:
0:11.0.21-5.redhat_00004.1.el10jws , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_web_server:7.0::el10 |
|
| Red Hat | Red Hat JBoss Web Server 7.0 on RHEL 8 |
Unaffected:
0:11.0.21-5.redhat_00004.1.el8jws , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_web_server:7.0::el8 |
|
| Red Hat | Red Hat JBoss Web Server 7.0 on RHEL 9 |
Unaffected:
0:11.0.21-5.redhat_00004.1.el9jws , < *
(rpm)
cpe:/a:redhat:jboss_enterprise_web_server:7.0::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat JBoss Web Server 5 |
cpe:/a:redhat:jboss_enterprise_web_server:5 |
|
| Red Hat | Red Hat JBoss Web Server 6 |
cpe:/a:redhat:jboss_enterprise_web_server:6 |
Credits
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: ac2344a6-31bc-4723-9ed3-ced1cafad44a
Exploited: Yes
Timestamps
First Seen: 2026-08-04
Asserted: 2026-08-04
Scope
Notes: Apache Tomcat Missing Encryption of Sensitive Data Vulnerability | Affected: Apache / Tomcat | Description: Apache Tomcat contains a missing encryption of sensitive data vulnerability that allows the bypass of the EncryptInterceptor. | 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. | Due date: 2026-08-07 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): 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
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-311 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Tomcat |
| Due Date | 2026-08-07 |
| Date Added | 2026-08-04 |
| Vendorproject | Apache |
| Vulnerabilityname | Apache Tomcat Missing Encryption of Sensitive Data Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-08-04 18:00 UTC
| Updated: 2026-08-04 18:00 UTC
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 4e9a3540-8de8-40a3-980a-a0e3aeded844
Exploited: Yes
Timestamps
First Seen: 2026-08-04
Asserted: 2026-08-04
Scope
Notes: Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor | Affected: Apache Software Foundation / Apache Tomcat | CVSS: 7.5 (HIGH) | EPSS: 0.42627 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor |
| Vendor | Apache Software Foundation |
| Product | Apache Tomcat |
| Added Date | 2026-08-04T16:45:52.078Z |
| Cvss Score | 7.5 |
| Epss Score | 0.42627 |
| Cvss Severity | HIGH |
| Epss Percentile | 0.9858 |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-08-04 18:00 UTC
| Updated: 2026-08-04 18:00 UTC
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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