Vulnerability in Apache Tomcat
CVE-2026-34486
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 · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.066 (93.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.986 · newest: 0.066 · change: -0.921
Affected products
- Apache Tomcat — versions 9.0.116, 10.1.53, 11.0.20
- Apache Software Foundation Tomcat — versions 11.0.20, 10.1.53, 9.0.116
- Red Hat Enterprise Linux — versions 8.0, 9.0, 10.0
- Red Hat Enterprise Linux Els — versions 7.0
- Red Hat Enterprise Linux Eus — versions 10.0
- Red Hat Enterprise Linux Tus — versions 8.8
- Red Hat Enterprise Linux Update Services For SAP Solutions — versions 8.8, 9.2, 9.4
- Red Hat Jboss Web Server — versions 7.0.0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
- striga-ai/CVE-2026-34486
- AirSkye/CVE-2026-34486-poc
- 404-src/CVE-2026-34486
- punitdarji/tomcat-cve-2026-34486
- CypherHippie/CVE-2026-34486---unauthenticated-RCE-via-Java-deserialization
- razureink/cve-2026-34486-tomcat_encrypt_bypass_reproduction
- anonmrc/CVE-2026-34486-e-Tomcat-Tribes
- helGayhub233/CVE-2026-34486-Tribes
References
- lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory, Mitigation)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory, Issue Tracking)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory)
Frequently asked questions
- What is CVE-2026-34486?
- CVE-2026-34486 is a high-severity vulnerability in Apache Tomcat, classified under Missing Encryption of Sensitive Data. CVSS score: 7.5/10. Published 2026-04-09.
- How severe is CVE-2026-34486?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2026-34486 known to be exploited?
- Yes. CVE-2026-34486 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-08-04), indicating it is being actively exploited. 8 public proof-of-concept repositories are indexed.