CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката може да се автоматизира
Описание
Оригинално описание
When "Trailer" headers are sent by a client, the HTTP server internally uses the header values to populate the Request.Trailer map passed to the server handler. Because Request.Trailer is a map, each entry incurs memory overhead. For HTTP/2 servers, a malicious client can exploit this by sending a "Trailer" header that declares a large number of fields, causing the server to allocate a disproportionate amount of memory while bypassing Server.MaxHeaderValueCount and Server.MaxHeaderBytes limits. This exploit is not applicable for HTTP/1 servers, which do not support multiplexing a large number of requests over one TCP connection, and whose Server.MaxHeaderBytes are calculated differently.
Засегнати продукти
- Go standard library net/http: преди 1.26.9
- Go standard library net/http/internal/http2: 1.27.0-0 преди 1.27.2
- golang.org/x/net golang.org/x/net/http2: преди 0.60.0
Вид слабост
История
- 8 октомври 2026 Публикувано
Други уязвимости в Go standard library net/http
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-78659
- https://nvd.nist.gov/vuln/detail/CVE-2026-78659
- https://go.dev/cl/847185
- https://go.dev/cl/847314
- https://go.dev/issue/81857
- https://groups.google.com/g/golang-announce/c/U2fTuyDJznI
- https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs
- https://pkg.go.dev/vuln/GO-2026-6603