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CVE-2026-86350

Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up

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

Original advisory

cve-program · CVE-2026-86350

Published

Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-86350

Published

Apache Tomcat

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",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "11.0.22",
                            "lessThanOrEqual": "11.0.25",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "10.1.55",
                            "lessThanOrEqual": "10.1.59",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "9.0.118",
                            "lessThanOrEqual": "9.0.121",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

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