# CVE-2026-86246

Insecure default TLS options in Apache Tomcat Native enabling remote code execution

- Page: https://www.vulneraibility.com/cve/CVE-2026-86246
- CVSS: 9.1
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.35% (percentile 28.5)
- CISA SSVC: exploitation none, automatable yes, technical impact total (assessed 2026-09-23)
- Weakness: CWE-1188
- Published: 2026-09-23

## Affected versions

- Apache Software Foundation Apache Tomcat Native: affected >= 2.0.0 and <= 2.0.15; >= 1.3.0 and <= 1.3.8

A version outside these ranges is not a statement that it is unaffected.

## Impact

Remote code execution via insecure default TLS settings (allow renegotiation, no EMS, weak DHE/no DHE), enabling session compromise or code execution.

## Action

Immediate action required

## Recommendation

Upgrade to 2.0.16 or 1.3.9, restart services and verify TLS configuration

## References

- [advisory] https://lists.apache.org/thread/dgyvfwb24nbk45ptvlhdyhdhl5o7k5ol
- [other] http://www.openwall.com/lists/oss-security/2026/09/23/32

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.