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TI-2026-59030 Aliases CVE-2026-86243GHSA-w68h-fc49-cmrg

Apache Tomcat Native: DoS via TLS handshake

Priority MEDIUM 40CWE-126Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 4 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-126 and the CVSS impact.

Summary

Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash. This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier, unsupported versions may also be affected. Users are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00564 47th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 4 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Tomcat Native2.0.0 – 2.0.15; 1.3.0 – 1.3.8—No fix listedCNA
  • Apache Tomcat Native VendorApache Affected 2.0.0 – 2.0.15; 1.3.0 – 1.3.8 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:tomcat_native:*:*:*:*:*:*:*:*1.3.0 to before 1.3.9; 2.0.0 to before 2.0.16VulnerableApache
  • cpe:2.3:a:apache:tomcat_native:*:*:*:*:*:*:*:* Versions 1.3.0 to before 1.3.9; 2.0.0 to before 2.0.16 Vulnerable ·Apache

Remediation

Red Hat 2 advisories

  • RHSA-2026:93618 Released 2026-11-03 · Red Hat rating Important
    Red Hat JBoss Web Server 7.0.3 release and security update
    • Red Hat JBoss Web Server 7.0 on RHEL 10 jws7-mod_cluster-2.1.1-1.Final_redhat_00001.1.el10jws, jws7-mod_cluster-tomcat-2.1.1-1.Final_redhat_00001.1.el10jws, jws7-tomcat-11.0.21-10.redhat_00010.1.el10jws +10
    • Red Hat JBoss Web Server 7.0 on RHEL 8 jws7-mod_cluster-2.1.1-1.Final_redhat_00001.1.el8jws, jws7-mod_cluster-tomcat-2.1.1-1.Final_redhat_00001.1.el8jws, jws7-tomcat-11.0.21-10.redhat_00010.1.el8jws +10
    • Red Hat JBoss Web Server 7.0 on RHEL 9 jws7-mod_cluster-2.1.1-1.Final_redhat_00001.1.el9jws, jws7-mod_cluster-tomcat-2.1.1-1.Final_redhat_00001.1.el9jws, jws7-tomcat-11.0.21-10.redhat_00010.1.el9jws +10
  • RHSA-2026:93622 Released 2026-11-03 · Red Hat rating Important
    Red Hat JBoss Web Server 7.0.3 release and security update
    • Red Hat JBoss Web Server 7.0.3

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat JBoss Web Server 6AffectedNo fix yet
Red Hat JBoss Web Server 7.0 on RHEL 10Fixed RHSA-2026:93618
Red Hat JBoss Web Server 7.0 on RHEL 8Fixed RHSA-2026:93618
Red Hat JBoss Web Server 7.0 on RHEL 9Fixed RHSA-2026:93618
Red Hat JBoss Web Server 7.0.3Fixed RHSA-2026:93622

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86243
  2. 2026-10-03 Alias added: GHSA-w68h-fc49-cmrg
  3. 2026-10-07 Priority changed: LOW → MEDIUM
  4. 2026-10-08 Affected versions changed · Red Hat
  5. 2026-10-08 CVSS score added · Red Hat
  6. 2026-11-03 Fix available: RHSA-2026:93622 · Red Hat
  7. 2026-11-03 Fix available: RHSA-2026:93618 · Red Hat
  8. 2026-11-03 Fix available: 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 +1 · Red Hat

References

Advisory 2

  • TI-2026-59033 Apache Tomcat Native: Insecure OpenSSL options enabled CVSS 3.1CRITICAL 9.1
  • TI-2026-23283 Apache Tomcat, Apache Tomcat Native: OCSP checks sometimes soft-fail even when soft-fail is disabled CVSS 3.1CRITICAL 9.1
  • TI-2018-05797 Improper certificate validation in Apache Tomcat Native CVSS 3.0HIGH 7.4
  • TI-2018-05796 Improper certificate validation in Apache Tomcat Native CVSS 3.0HIGH 7.4
  • TI-2026-59034 Apache Tomcat Native: Client certificate requirements can be down-graded CVSS 3.1HIGH 7.4
  • TI-2026-19939 Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass CVSS 3.1HIGH 7.5
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences