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CVE-2026-86243

Apache Tomcat Native: DoS via TLS handshake

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-86243

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-86243

Published

Apache Tomcat Native

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Apache Software Foundation",
                    "product": "Apache Tomcat Native",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "2.0.0",
                            "lessThanOrEqual": "2.0.15",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "1.3.0",
                            "lessThanOrEqual": "1.3.8",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON