fastify vulnerable to Denial of Service via unhandled exception on HTTP/2 trailer responses
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| fastify | fastify | unaffected |
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| Fastify | Fastify |
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| Source | ID | Title |
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Github GHSA |
GHSA-4mh8-r7rc-xpvc | fastify vulnerable to Denial of Service via unhandled exception on HTTP/2 trailer responses |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.412% probability within 30 days)
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Fastify
Fastify fastify |
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Fastify
Fastify fastify |
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ssvc
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threat_severity
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threat_severity
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| Description | 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. | |
| Title | fastify vulnerable to Denial of Service via unhandled exception on HTTP/2 trailer responses | |
| Weaknesses | CWE-248 | |
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| Metrics |
cvssV3_1
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