{"id":"CVE-2018-15503","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-15503","generatedAt":"2026-10-28T22:20:09.035Z","title":"The unpack implementation in Swoole version 4.0.4 lacks correct size checks in the deserialization process.","description":"The unpack implementation in Swoole version 4.0.4 lacks correct size checks in the deserialization process. An attacker can craft a serialized object to exploit this vulnerability and cause a SEGV.","published":"2018-08-18T02:29:02.000Z","lastModified":"2026-06-17T01:42:40.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-502"],"affected":["swoole/swoole"],"epss":{"score":0.02272,"percentile":0.82981,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (2.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/swoole/swoole-src/commit/4cdbce5d9bf2fe596bb6acd7d6611f9e8c253a76","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/swoole/swoole-src/issues/1882","tags":["Issue Tracking","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://x-c3ll.github.io/posts/swoole-deserialization-cve-2018-15503/","tags":["Technical Description","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/swoole/swoole-src/commit/4cdbce5d9bf2fe596bb6acd7d6611f9e8c253a76","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/swoole/swoole-src/issues/1882","tags":["Issue Tracking","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://x-c3ll.github.io/posts/swoole-deserialization-cve-2018-15503/","tags":["Technical Description","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-15503","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}