{"id":"CVE-2026-102477","details":"In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], a gRPC endpoint does have a configurable per message maximum size in bytes, however the maximum size applies to the received bytes. When applied to a compressed message, this only applies to the compressed size and not the actual size of the uncompressed content. This can be used to force a gRPC endpoint to allocate more bytes than the value defined by the configuration, making the endpoint vulnerable to compression bomb attacks.\n\n\n\nThe impacted component is io.vertx:vertx-gprc-server.","aliases":["GHSA-4wvq-75mw-q6cg"],"modified":"2026-10-17T02:47:30.930405258Z","published":"2026-10-15T08:28:25.876Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102477.json","cna_assigner":"eclipse"},"references":[{"type":"WEB","url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/349"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102477.json"},{"type":"ADVISORY","url":"https://github.com/eclipse-vertx/vertx-grpc/security/advisories/GHSA-4wvq-75mw-q6cg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102477"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/eclipse-vertx/vertx-grpc","events":[{"introduced":"0"},{"last_affected":"d3ba8a52ba53b31640e9074e8dc66c7950bdb6d6"},{"introduced":"462f9aa5b2e42ed0e5aced1f1ebc99138a129268"},{"last_affected":"1a15e63ed1e0616714bec0312a32c1d935762bb0"},{"introduced":"83d529e51c7972b5649601c4a86e468da59724e1"},{"last_affected":"688605648a048fd08017e178f1c4478d0f938882"},{"introduced":"23abaa946e0533ae327400852c754ed2cfec2e06"},{"last_affected":"23abaa946e0533ae327400852c754ed2cfec2e06"}],"database_specific":{"extracted_events":[{"introduced":"4.0.0"},{"last_affected":"4.5.34"},{"introduced":"5.0.0"},{"last_affected":"5.0.12"},{"introduced":"5.1.0"},{"last_affected":"5.1.9"},{"introduced":"5.2.0"},{"last_affected":"5.2.0"}],"source":"AFFECTED_FIELD"}}],"versions":["5.2.0","4.5.34","4.5.33","4.5.32","4.5.31","4.5.30","4.5.29","4.5.28","4.5.27","5.0.12","5.0.11","5.0.10","4.5.26","5.0.9","5.0.8","4.5.25","4.5.24","5.0.7","5.0.6","4.5.23","5.0.5","4.5.22","5.0.4","4.5.21","4.5.20","4.5.19","5.0.3","4.5.18","4.5.17","5.0.2","5.0.1","4.5.16","4.5.15","5.0.0","4.5.14","4.5.13","4.5.12","4.5.11","4.5.10","4.5.9","4.5.8","4.5.7","4.5.6","4.5.5","4.5.4","4.5.3","4.5.2","4.5.1","4.5.0","4.4.5","4.4.4","4.4.3","4.4.2","4.4.1","4.4.0","4.3.5","4.3.4","4.3.3","4.3.2","4.3.1","4.3.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102477.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}