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CVE-2026-86246

Apache Tomcat Native vulnerability

9.1 CRITICALEPSS 0.36%
  1. Published23 Sept 2026

Description

Initialization of a resource with an insecure default vulnerability in Apache Tomcat Native enabled insecure options by default including ALLOW_CLIENT_RENEGOTIATION, NO_EXTENDED_MASTER_SECRET, IGNORE_UNEXPECTED_EOF and ALLOW_NO_DHE_KEX. 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 2.0.16 or 1.3.9, which fix the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Apache Tomcat Native≥ 1.3.0 < 1.3.9 · ≥ 2.0.0 < 2.0.16

Remediation

Fixed in
Apache Tomcat Native≥ 1.3.9

References

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Frequently asked

Is CVE-2026-86246 being actively exploited?

CVE-2026-86246 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.36%.

How severe is CVE-2026-86246?

CVE-2026-86246 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.36% probability of exploitation.

Which products are affected by CVE-2026-86246?

Affected products include Apache Tomcat Native.

How do I fix CVE-2026-86246?

Upgrade affected software to a fixed version, for example Apache Tomcat Native 1.3.9 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-86246 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.