{"id":"GHSA-m425-mq94-257g","aliases":["GO-2023-2153"],"status":"published","title":"gRPC-Go HTTP/2 Rapid Reset vulnerability","description":"### Impact\nIn affected releases of gRPC-Go, it is possible for an attacker to send HTTP/2 requests, cancel them, and send subsequent requests, which is valid by the HTTP/2 protocol, but would cause the gRPC-Go server to launch more concurrent method handlers than the configured maximum stream limit.\n\n### Patches\nThis vulnerability was addressed by #6703 and has been included in patch releases: 1.56.3, 1.57.1, 1.58.3.  It is also included in the latest release, 1.59.0.\n\nAlong with applying the patch, users should also ensure they are using the `grpc.MaxConcurrentStreams` server option to apply a limit to the server's resources used for any single connection.\n\n### Workarounds\nNone.\n\n### References\n#6703","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2023-10-25T21:17:37Z","modified":"2026-09-10T03:49:58Z","fixes":[{"ecosystem":"Go","package":"google.golang.org/grpc","fixed_in":["1.56.3","1.57.1","1.58.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"google.golang.org/grpc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.56.3"}]}]},{"source":"ghsa","ecosystem":"Go","package":"google.golang.org/grpc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.57.0"},{"fixed":"1.57.1"}]}]},{"source":"ghsa","ecosystem":"Go","package":"google.golang.org/grpc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.58.0"},{"fixed":"1.58.3"}]}]},{"source":"osv","ecosystem":"Go","package":"google.golang.org/grpc","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.56.3"}]}]},{"source":"osv","ecosystem":"Go","package":"google.golang.org/grpc","ranges":[{"type":"SEMVER","events":[{"introduced":"1.57.0"},{"fixed":"1.57.1"}]}]},{"source":"osv","ecosystem":"Go","package":"google.golang.org/grpc","ranges":[{"type":"SEMVER","events":[{"introduced":"1.58.0"},{"fixed":"1.58.3"}]}]},{"source":"osv","ecosystem":"Go","package":"google.golang.org/grpc","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.56.3"},{"introduced":"1.57.0"},{"fixed":"1.57.1"},{"introduced":"1.58.0"},{"fixed":"1.58.3"}]}]}],"references":[{"url":"https://github.com/grpc/grpc-go/security/advisories/GHSA-m425-mq94-257g","tags":["web"]},{"url":"https://github.com/grpc/grpc-go/pull/6703","tags":["web"]},{"url":"https://github.com/grpc/grpc-go/commit/f2180b4d5403d2210b30b93098eb7da31c05c721","tags":["web","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-44487","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-m425-mq94-257g"},{"url":"https://github.com/grpc/grpc-go","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-m425-mq94-257g","title":"gRPC-Go HTTP/2 Rapid Reset vulnerability","description":"### Impact\nIn affected releases of gRPC-Go, it is possible for an attacker to send HTTP/2 requests, cancel them, and send subsequent requests, which is valid by the HTTP/2 protocol, but would cause the gRPC-Go server to launch more concurrent method handlers than the configured maximum stream limit.\n\n### Patches\nThis vulnerability was addressed by #6703 and has been included in patch releases: 1.56.3, 1.57.1, 1.58.3.  It is also included in the latest release, 1.59.0.\n\nAlong with applying the patch, users should also ensure they are using the `grpc.MaxConcurrentStreams` server option to apply a limit to the server's resources used for any single connection.\n\n### Workarounds\nNone.\n\n### References\n#6703\n","status":"published","published":"2023-10-25T21:17:37Z","modified":"2024-07-19T16:32:30Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T14:37:56.530214Z"}],"osv":[{"id":"GHSA-m425-mq94-257g","title":"gRPC-Go HTTP/2 Rapid Reset vulnerability","description":"### Impact\nIn affected releases of gRPC-Go, it is possible for an attacker to send HTTP/2 requests, cancel them, and send subsequent requests, which is valid by the HTTP/2 protocol, but would cause the gRPC-Go server to launch more concurrent method handlers than the configured maximum stream limit.\n\n### Patches\nThis vulnerability was addressed by #6703 and has been included in patch releases: 1.56.3, 1.57.1, 1.58.3.  It is also included in the latest release, 1.59.0.\n\nAlong with applying the patch, users should also ensure they are using the `grpc.MaxConcurrentStreams` server option to apply a limit to the server's resources used for any single connection.\n\n### Workarounds\nNone.\n\n### References\n#6703\n","status":"published","published":"2023-10-25T21:17:37Z","modified":"2026-09-10T03:49:58.618819673Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:46:51.10002Z"},{"id":"GO-2023-2153","title":"Denial of service from HTTP/2 Rapid Reset in google.golang.org/grpc","description":"An attacker can send HTTP/2 requests, cancel them, and send subsequent requests. This is valid by the HTTP/2 protocol, but would cause the gRPC-Go server to launch more concurrent method handlers than the configured maximum stream limit, grpc.MaxConcurrentStreams. This results in a denial of service due to resource consumption.","status":"published","published":"2023-11-01T22:39:27Z","modified":"2026-02-04T03:41:04.904803Z","updated_at":"2026-11-02T15:47:01.185262Z"}]}}