{"id":"CVE-2026-90473","aliases":["DEBIAN-CVE-2026-90473","EUVD-2026-76849","GHSA-9vjp-f3jg-99pq","UBUNTU-CVE-2026-90473"],"status":"published","title":"msgpack-java through 0.9.12 Integer Overflow via MAP32","description":"msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00412,"percentile":0.35895,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190"],"published":"2026-09-12T11:06:12Z","modified":"2026-10-28T02:30:48Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"msgpack-java","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.3-1","0.9.4-1","0.9.5-1","0.9.6-1"]},{"source":"osv","ecosystem":"Debian:13","package":"msgpack-java","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.6-1"]},{"source":"osv","ecosystem":"Debian:14","package":"msgpack-java","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.6-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"msgpack-java","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.18-2","0.8.19-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"msgpack-java","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.22-2","0.9.0-1","0.9.0-2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"msgpack-java","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.5-1","0.9.6-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"msgpack-java","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.6-1build1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"msgpack-java","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.6-1","0.9.6-1build1"]}],"products":[{"vendor":"msgpack","product":"msgpack-java"}],"references":[{"url":"https://github.com/msgpack/msgpack-java/issues/1014","tags":["issue-tracking","report"]},{"url":"https://github.com/msgpack/msgpack-java/blob/v0.9.12/msgpack-core/src/main/java/org/msgpack/core/MessageUnpacker.java#L573-L581","tags":["technical-description","article","report"]},{"url":"https://github.com/msgpack/msgpack-java","tags":["product","package","report"]},{"url":"https://www.vulncheck.com/advisories/msgpack-java-through-0.9.12-integer-overflow-via-map32","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90473","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-9vjp-f3jg-99pq"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90473.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-90473","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-90473","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90473","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-90473","title":"msgpack-java through 0.9.12 Integer Overflow via MAP32","description":"msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.","status":"published","published":"2026-09-12T11:06:12.224Z","modified":"2026-09-24T14:21:44.215Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T13:45:59.110885Z"}],"euvd":[{"id":"EUVD-2026-76849","description":"msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.","status":"published","published":"2026-09-12T11:06:12Z","modified":"2026-09-24T14:21:44Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:27:57.402158Z"}],"ghsa":[{"id":"GHSA-9vjp-f3jg-99pq","title":"msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker...","description":"msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.","status":"published","published":"2026-09-12T12:30:50Z","modified":"2026-09-12T12:30:51Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T15:11:45.662784Z"}],"nvd":[{"id":"CVE-2026-90473","description":"msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.","status":"published","published":"2026-09-12T11:16:34.347Z","modified":"2026-09-23T17:17:47.37Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:12:46.62721Z"}],"osv":[{"id":"CVE-2026-90473","title":"msgpack-java through 0.9.12 Integer Overflow via MAP32","description":"msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.","status":"published","published":"2026-09-12T11:06:12.224Z","modified":"2026-10-28T02:30:48.232780704Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T15:45:20.269367Z"},{"id":"DEBIAN-CVE-2026-90473","description":"msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.","status":"published","published":"2026-09-12T11:16:34.347Z","modified":"2026-09-24T08:47:30.35281895Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:46:06.410207Z"},{"id":"UBUNTU-CVE-2026-90473","description":"msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.","status":"published","published":"2026-09-12T11:16:00Z","modified":"2026-10-17T13:01:17.019303801Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:57:35.676249Z"}]}}