{"id":"CVE-2026-107302","revision":"997c827fee9648a993355fbbd78de05e","records":[{"revision":"997c827fee9648a993355fbbd78de05e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-107302","aliases":[],"title":"msgpack5: Truncated map32 headers throw an unexpected error","description":"msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the decoder reads the four-byte length of a map32 value before validating that the complete five-byte header is available. A truncated map32 header therefore causes a checked out-of-bounds buffer read and throws RangeError instead of IncompleteBufferError, which can unexpectedly terminate a request, stream, or worker in applications that wait for additional bytes after IncompleteBufferError. There is no adjacent-memory disclosure because the buffer implementation checks bounds. This issue is fixed in version 6.1.0.","state":0,"publishedAt":"2026-10-08T17:14:19.514+00:00","modifiedAt":"2026-10-19T19:29:15.139+00:00","affected":[{"ecosystem":"Vendor product","name":"msgpack5","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"mcollina\",\n                    \"product\": \"msgpack5\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 4.1.0. < 6.1.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/mcollina/msgpack5/security/advisories/GHSA-8f34-f56x-9xph","https://github.com/mcollina/msgpack5/commit/15443a1f2aa682a6aa37f1705ac628de5b866ad1","https://github.com/mcollina/msgpack5/releases/tag/v6.1.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-107302","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-107302","identifiers":["CVE-2026-107302"]},"retained":false,"historicalAffected":[]}],"coverage":[]}