{"cve":"CVE-2026-32284","nvd":{"published":"2026-03-26T20:16:12.087","modified":"2026-10-07T18:17:20.127","status":"Analyzed","description":"The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-125"],"references":["https://github.com/golang/vulndb/issues/4513","https://github.com/shamaton/msgpack/issues/59","https://pkg.go.dev/vuln/GO-2026-4513","https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026"],"products":["shamaton:msgpack"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-32284","score":0.00421,"percentile":0.36123,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-h9q6-hc68-35rp","url":"https://osv.dev/vulnerability/GHSA-h9q6-hc68-35rp","summary":"Denial of service in github.com/shamaton/msgpack","modified":"2026-10-07T17:56:03.323669413Z","packages":[{"ecosystem":"Go","name":"github.com/shamaton/msgpack/v2","purl":"pkg:golang/github.com/shamaton/msgpack/v2","ranges":["<=2.4.0"],"fixed":[]},{"ecosystem":"Go","name":"github.com/shamaton/msgpack/v3","purl":"pkg:golang/github.com/shamaton/msgpack/v3","ranges":["<=3.1.0"],"fixed":[]}]},{"id":"GO-2026-4513","url":"https://osv.dev/vulnerability/GO-2026-4513","summary":"Denial of service in github.com/shamaton/msgpack","modified":"2026-10-07T17:56:03.323669413Z","packages":[{"ecosystem":"Go","name":"github.com/shamaton/msgpack","purl":"pkg:golang/github.com/shamaton/msgpack","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/shamaton/msgpack/v2","purl":"pkg:golang/github.com/shamaton/msgpack/v2","ranges":["<2.4.1"],"fixed":["2.4.1"]},{"ecosystem":"Go","name":"github.com/shamaton/msgpack/v3","purl":"pkg:golang/github.com/shamaton/msgpack/v3","ranges":["<3.1.1"],"fixed":["3.1.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}