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CVE-2026-86350 is an HTTP/2 request/response smuggling vulnerability in Apache Tomcat caused by a regression in the fix for CVE-2026-41293. Inconsistent interpretation of HTTP/2 requests can cause headers to be associated with the wrong request, resulting in a request-header mix-up. Affected versions are Apache Tomcat 11.0.22 through 11.0.25, 10.1.55 through 10.1.59, and 9.0.118 through 9.0.121.
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An HTTP/2 request-header mix-up caused by inconsistent request interpretation.
An Apache Tomcat HTTP/2 request-header mix-up caused by a regression in an earlier security fix.
An Apache Tomcat HTTP/2 request/response-smuggling vulnerability that can cause request-header mix-up due to inconsistent HTTP/2 request interpretation. It affects Tomcat 11.0.22–11.0.25, 10.1.55–10.1.59, and 9.0.118–9.0.121.
Unknown; the content lists this Apache Tomcat CVE but provides no technical description.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.