fastify vulnerable to Denial of Service via uncaught exception on handlerTimeout with streaming 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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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.329% probability within 30 days)
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ssvc
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Fastify
Fastify fastify |
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Fastify
Fastify fastify |
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| Description | fastify is a web framework for Node.js. In versions 5.8.0 through 5.12.7, when the server is configured with a nonzero handlerTimeout and a route returns a streaming response, a request whose stream has already sent its headers but stays open past the timeout crashes the server. When the timeout fires, Fastify tries to send a new error response on a response that has already started, raising an uncaught ERR_HTTP_HEADERS_SENT that terminates the Node.js process and interrupts any other in-flight requests. An unauthenticated remote client can trigger this with a single request to an affected streaming endpoint, so the impact is availability only, and exploitation requires the non-default handlerTimeout to be set. The default handlerTimeout of 0 is not affected. The issue is fixed in fastify 5.12.8, and users should upgrade to 5.12.8 or later. As a workaround, set handlerTimeout to 0, which disables the affected timeout path. | |
| Title | fastify vulnerable to Denial of Service via uncaught exception on handlerTimeout with streaming responses | |
| Weaknesses | CWE-248 | |
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cvssV3_1
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