{"id":"CVE-2021-39150","aliases":["GHSA-cxfm-5m4g-x7xp"],"url":"https://o3.security/vulnerability/CVE-2021-39150","summary":"A Server-Side Forgery Request can be activated unmarshalling with XStream to access data streams from an arbitrary URL referencing a resource in an intranet or the local host","details":"### Impact\nThe vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types.\n\n### Patches\nIf you rely on XStream's default blacklist of the [Security Framework](https://x-stream.github.io/security.html#framework), you will have to use at least version 1.4.18.\n\n### Workarounds\nSee [workarounds](https://x-stream.github.io/security.html#workaround) for the different versions covering all CVEs.\n\n### References\nSee full information about the nature of the vulnerability and the steps to reproduce it in XStream's documentation for [CVE-2021-39150](https://x-stream.github.io/CVE-2021-39150.html).\n\n### Credits\nLai Han of NSFOCUS security team found and reported the issue to XStream and provided the required information to reproduce it.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [XStream](https://github.com/x-stream/xstream/issues)\n* Contact us at [XStream Google Group](https://groups.google.com/group/xstream-user)\n","published":"2021-08-23T19:15:12.803Z","modified":"2026-10-09T02:30:45.897274285Z","cvss":{"score":8.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Maven","name":"com.thoughtworks.xstream:xstream","fixedVersion":"1.4.18"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/x-stream/xstream/security/advisories/GHSA-cxfm-5m4g-x7xp"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/09/msg00017.html"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210923-0003/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2021/dsa-5004"},{"type":"ADVISORY","url":"https://www.oracle.com/security-alerts/cpujul2022.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujan2022.html"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/"},{"type":"EVIDENCE","url":"https://x-stream.github.io/CVE-2021-39150.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39150"},{"type":"PACKAGE","url":"https://github.com/x-stream/xstream"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20210923-0003"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-09T02:30:45.897274285Z"}}