Is CVE-2026-34486 being actively exploited?

Yes. CVE-2026-34486 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on August 4, 2026.

What is the CVSS score for CVE-2026-34486?

CVE-2026-34486 has a CVSS 3.1 base score of 7.5 (HIGH).

CVE-2026-34486

HIGH · CVSS 7.5CISA KEV: actively exploitedEPSS 6.6%EU EUVD: exploited

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.

Key facts

CVSS score: 7.5 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-311
EPSS score: 6.6% (94th percentile)
In CISA KEV: Yes, added August 4, 2026
In EU EUVD: Yes (EUVD-2026-21056)
Published: April 9, 2026
NVD last modified: September 21, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Apache Tomcat Missing Encryption of Sensitive Data Vulnerability

Added to the KEV catalog on August 4, 2026; federal remediation due August 7, 2026.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2026-21056 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on September 21, 2026.

View on the EU Vulnerability Database

Affected products

apache / tomcat
apache / tomcat
apache / tomcat
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux els
redhat / enterprise linux eus
redhat / enterprise linux tus
redhat / enterprise linux update services for sap solutions
redhat / enterprise linux update services for sap solutions
redhat / enterprise linux update services for sap solutions
redhat / enterprise linux update services for sap solutions
redhat / jboss web server

Certified products that may be affected

32 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat, Inc. - FIPS 140 5513 - active
Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, LLC - FIPS 140 5461 - active
Red Hat Enterprise Linux 9 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5445 - active
Red Hat Enterprise Linux 9 libgcrypt - Red Hat, Inc. - FIPS 140 5366 - active
Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5089 - active

See all 32 in the Security Certifications Explorer.

References

https://access.redhat.com/errata/RHSA-2026:36787(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:36788(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:36789(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:36790(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:36876(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:36877(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:36878(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:36879(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:37136(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:37137(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:38505(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:39188(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2026:39189(Third Party Advisory)
https://access.redhat.com/security/cve/CVE-2026-34486(Third Party Advisory)
https://bugzilla.redhat.com/show_bug.cgi?id=2457027(Issue Tracking, Third Party Advisory)
https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly(Mailing List, Vendor Advisory)
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34486.json(Third Party Advisory)
https://socradar.io/blog/snowlight-government-chinese-campaign/(Third Party Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34486(US Government Resource)
https://www.vicarius.io/vsociety/posts/cve-2026-34486-detection-script-rce-on-apache-tomcat(Third Party Advisory)
https://www.vicarius.io/vsociety/posts/cve-2026-34486-mitigation-script-rce-on-apache-tomcat(Mitigation, Third Party Advisory)

Last updated September 23, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain