{"id":"CVE-2021-39149","revision":"5870dfef9f8b49c4acb6a2df6577751a","records":[{"revision":"5870dfef9f8b49c4acb6a2df6577751a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2021-39149","aliases":[],"title":"XStream is vulnerable to an Arbitrary Code Execution attack","description":"XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.","state":0,"publishedAt":"2021-08-23T18:05:44+00:00","modifiedAt":"2026-10-07T19:58:22.619+00:00","affected":[{"ecosystem":"Vendor product","name":"xstream","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"xstream\",\n                    \"vendor\": \"x-stream\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"< 1.4.18\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","score":8.5,"severity":"HIGH"}],"references":["https://github.com/x-stream/xstream/security/advisories/GHSA-3ccq-5vw3-2p6x","https://x-stream.github.io/CVE-2021-39149.html","https://lists.debian.org/debian-lts-announce/2021/09/msg00017.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/","https://www.debian.org/security/2021/dsa-5004","https://www.oracle.com/security-alerts/cpujan2022.html","https://security.netapp.com/advisory/ntap-20210923-0003/","https://www.oracle.com/security-alerts/cpuapr2022.html","https://www.oracle.com/security-alerts/cpujul2022.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2021-39149","license":"CVE Program Terms of Use","key":"cve-program:CVE-2021-39149","identifiers":["CVE-2021-39149"]},"retained":false,"historicalAffected":[]}],"coverage":[]}