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        "cveId": "CVE-2026-92081",
        "assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
        "state": "PUBLISHED",
        "assignerShortName": "openjs",
        "dateReserved": "2026-09-15T12:55:43.189Z",
        "datePublished": "2026-09-16T08:52:49.757Z",
        "dateUpdated": "2026-09-16T14:00:59.305Z"
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                    "lang": "en",
                    "value": "fastify is a fast and low-overhead web framework for Node.js. In versions before 5.12.5, when a route registers a response trailer via reply.trailer() and is served over HTTP/2, fastify unconditionally sets the Transfer-Encoding: chunked header, which is forbidden on HTTP/2, so Node.js throws while serializing the response headers. The exception is not caught and becomes an uncaughtException, so a single unauthenticated HTTP/2 request to any route that uses trailers crashes the server process and drops all in-flight requests, and it can be repeated on every restart. The issue is fixed in fastify 5.12.5, and users should upgrade to 5.12.5 or later. As a workaround, avoid registering response trailers with reply.trailer() on routes served over HTTP/2 until upgrading.",
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                            "value": "fastify is a fast and low-overhead web framework for Node.js. In versions before 5.12.5, when a route registers a response trailer via reply.trailer() and is served over HTTP/2, fastify unconditionally sets the Transfer-Encoding: chunked header, which is forbidden on HTTP/2, so Node.js throws while serializing the response headers. The exception is not caught and becomes an uncaughtException, so a single unauthenticated HTTP/2 request to any route that uses trailers crashes the server process and drops all in-flight requests, and it can be repeated on every restart. The issue is fixed in fastify 5.12.5, and users should upgrade to 5.12.5 or later. As a workaround, avoid registering response trailers with reply.trailer() on routes served over HTTP/2 until upgrading."
                        }
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                    "product": "fastify",
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            "references": [
                {
                    "url": "https://github.com/fastify/fastify/security/advisories/GHSA-4mh8-r7rc-xpvc"
                },
                {
                    "url": "https://cna.openjsf.org/security-advisories.html"
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                    "type": "remediation reviewer",
                    "value": "UlisesGascon"
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            "title": "fastify vulnerable to Denial of Service via unhandled exception on HTTP/2 trailer responses",
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                            "cweId": "CWE-248",
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                            "description": "CWE-248: Uncaught Exception",
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                                "timestamp": "2026-09-16T14:00:06.966478Z",
                                "id": "CVE-2026-92081",
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                                        "Exploitation": "none"
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