{"id":"CVE-2026-106971","title":"An integer overflow in the MessagePack\\BufferUnpacker component of rybakit/msgpack versions prior to 0.11.0 allows attackers to cause a denial of service via crafted MessagePack input when the application runs on 32-bit PHP","summary":"An integer overflow in the MessagePack\\BufferUnpacker component of rybakit/msgpack versions prior to 0.11.0 allows attackers to cause a denial of service via crafted MessagePack input when the application runs on 32-bit PHP","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"adp","ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-11-03T12:25:58.586014Z"},"exploitAvailable":true,"published":"2026-10-28","updated":"2026-11-03","sourceUpdated":"2026-11-03T12:26:13.361Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106971","references":[{"url":"https://github.com/rybakit/msgpack.php"},{"url":"https://github.com/rybakit/msgpack.php/releases/tag/v0.11.0"},{"url":"https://github.com/diptendukar/security-advisories/blob/main/CVE-2026-106971.md"}],"tags":["cve.org","exploit-available"],"epss":0.00339,"epssPercentile":0.275,"ingestedAt":"2026-10-28T15:13:08.985Z","slug":"CVE-2026-106971","body":"## Overview\n\nAn integer overflow in the MessagePack\\BufferUnpacker component of rybakit/msgpack versions prior to 0.11.0 allows attackers to cause a denial of service via crafted MessagePack input when the application runs on 32-bit PHP\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":233637,"id":"CVE-2026-106971","ts":1793907148043,"field":"exploit_available","old":"false","new":"true"},{"seq":233636,"id":"CVE-2026-106971","ts":1793907148043,"field":"cvss","old":null,"new":"7.5"},{"seq":233635,"id":"CVE-2026-106971","ts":1793907148043,"field":"severity","old":"none","new":"high"}]}