{"api_version":"1","generated_at":"2026-04-22T23:08:44+00:00","cve":"CVE-2020-26258","urls":{"html":"https://cve.report/CVE-2020-26258","api":"https://cve.report/api/cve/CVE-2020-26258.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-26258","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-26258"},"summary":{"title":"CVE-2020-26258","description":"XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.15, a Server-Side Forgery Request vulnerability can be activated when unmarshalling. The vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.15. The reported vulnerability does not exist if running Java 15 or higher. No user is affected who followed the recommendation to setup XStream's Security Framework with a whitelist! Anyone relying on XStream's default blacklist can immediately switch to a whilelist for the allowed types to avoid the vulnerability. Users of XStream 1.4.14 or below who still want to use XStream default blacklist can use a workaround described in more detailed in the referenced advisories.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2020-12-16 01:15:00","updated_at":"2023-11-07 03:20:00"},"problem_types":["CWE-918"],"metrics":[],"references":[{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/","name":"FEDORA-2021-d894ca87dc","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 34 Update: xstream-1.4.18-2.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/","name":"FEDORA-2021-fbad11014a","refsource":"","tags":[],"title":"[SECURITY] Fedora 33 Update: xstream-1.4.18-2.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/x-stream/xstream/security/advisories/GHSA-4cch-wxpw-8p28","name":"https://github.com/x-stream/xstream/security/advisories/GHSA-4cch-wxpw-8p28","refsource":"CONFIRM","tags":["Exploit","Third Party Advisory"],"title":"A Server-Side Forgery Request can be activated unmarshalling with XStream · Advisory · x-stream/xstream · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.debian.org/security/2021/dsa-4828","name":"DSA-4828","refsource":"DEBIAN","tags":["Patch","Third Party Advisory"],"title":"Debian -- Security Information -- DSA-4828-1 libxstream-java","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00042.html","name":"[debian-lts-announce] 20201231 [SECURITY] [DLA 2507-1] libxstream-java security update","refsource":"MLIST","tags":["Mailing List","Third Party Advisory"],"title":"[SECURITY] [DLA 2507-1] libxstream-java security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/","name":"FEDORA-2021-d894ca87dc","refsource":"","tags":[],"title":"[SECURITY] Fedora 34 Update: xstream-1.4.18-2.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://x-stream.github.io/CVE-2020-26258.html","name":"https://x-stream.github.io/CVE-2020-26258.html","refsource":"MISC","tags":["Exploit","Mitigation","Third Party Advisory"],"title":"XStream - CVE-2020-26258","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://security.netapp.com/advisory/ntap-20210409-0005/","name":"https://security.netapp.com/advisory/ntap-20210409-0005/","refsource":"CONFIRM","tags":[],"title":"December 2020 XStream Vulnerabilities in NetApp Products | NetApp Product Security","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/","name":"FEDORA-2021-5e376c0ed9","refsource":"","tags":[],"title":"[SECURITY] Fedora 35 Update: xstream-1.4.18-2.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.apache.org/thread.html/r97993e3d78e1f5389b7b172ba9f308440830ce5f051ee62714a0aa34@%3Ccommits.struts.apache.org%3E","name":"[struts-commits] 20201221 [struts] branch master updated: Upgrades XStream to version 1.4.15 to address CVE-2020-26258, CVE-2020-26259","refsource":"MLIST","tags":["Mailing List","Third Party Advisory"],"title":"Pony Mail!","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/","name":"FEDORA-2021-fbad11014a","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 33 Update: xstream-1.4.18-2.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/","name":"FEDORA-2021-5e376c0ed9","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 35 Update: xstream-1.4.18-2.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.apache.org/thread.html/r97993e3d78e1f5389b7b172ba9f308440830ce5f051ee62714a0aa34%40%3Ccommits.struts.apache.org%3E","name":"[struts-commits] 20201221 [struts] branch master updated: Upgrades XStream to version 1.4.15 to address CVE-2020-26258, CVE-2020-26259","refsource":"","tags":[],"title":"Pony Mail!","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-26258","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26258","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"26258","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"10.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"26258","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"9.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"26258","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"10.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"26258","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"9.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"26258","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"33","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"26258","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"34","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"26258","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"35","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"26258","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"xstream_project","cpe5":"xstream","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"26258","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"xstream_project","cpe5":"xstream","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2020-26258","qid":"174824","title":"SUSE Enterprise Linux Security update for SUSE Manager Server 4.1 (SUSE-SU-2021:0906-1)"},{"cve":"CVE-2020-26258","qid":"198361","title":"Ubuntu Security Notification for XStream vulnerabilities (USN-4943-1)"},{"cve":"CVE-2020-26258","qid":"281980","title":"Fedora Security Update for xstream (FEDORA-2021-d894ca87dc)"},{"cve":"CVE-2020-26258","qid":"281981","title":"Fedora Security Update for xstream (FEDORA-2021-fbad11014a)"},{"cve":"CVE-2020-26258","qid":"375337","title":"IBM Spectrum Control Multiple Vulnerability(6415993)"},{"cve":"CVE-2020-26258","qid":"375827","title":"XStream Arbitrary Code Execution And Multiple vulnerabilities"},{"cve":"CVE-2020-26258","qid":"750401","title":"OpenSUSE Security Update for xstream (openSUSE-SU-2021:0140-1)"},{"cve":"CVE-2020-26258","qid":"980088","title":"Java (maven) Security Update for com.thoughtworks.xstream:xstream (GHSA-4cch-wxpw-8p28)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2020-26258","STATE":"PUBLIC","TITLE":"A Server-Side Forgery Request can be activated unmarshalling with XStream"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"xstream","version":{"version_data":[{"version_value":"< 1.4.15"}]}}]},"vendor_name":"x-stream"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.15, a Server-Side Forgery Request vulnerability can be activated when unmarshalling. The vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.15. The reported vulnerability does not exist if running Java 15 or higher. No user is affected who followed the recommendation to setup XStream's Security Framework with a whitelist! Anyone relying on XStream's default blacklist can immediately switch to a whilelist for the allowed types to avoid the vulnerability. Users of XStream 1.4.14 or below who still want to use XStream default blacklist can use a workaround described in more detailed in the referenced advisories."}]},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-918 Server-Side Request Forgery (SSRF)"}]}]},"references":{"reference_data":[{"name":"https://github.com/x-stream/xstream/security/advisories/GHSA-4cch-wxpw-8p28","refsource":"CONFIRM","url":"https://github.com/x-stream/xstream/security/advisories/GHSA-4cch-wxpw-8p28"},{"name":"https://x-stream.github.io/CVE-2020-26258.html","refsource":"MISC","url":"https://x-stream.github.io/CVE-2020-26258.html"},{"refsource":"MLIST","name":"[struts-commits] 20201221 [struts] branch master updated: Upgrades XStream to version 1.4.15 to address CVE-2020-26258, CVE-2020-26259","url":"https://lists.apache.org/thread.html/r97993e3d78e1f5389b7b172ba9f308440830ce5f051ee62714a0aa34@%3Ccommits.struts.apache.org%3E"},{"refsource":"MLIST","name":"[debian-lts-announce] 20201231 [SECURITY] [DLA 2507-1] libxstream-java security update","url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00042.html"},{"refsource":"DEBIAN","name":"DSA-4828","url":"https://www.debian.org/security/2021/dsa-4828"},{"refsource":"CONFIRM","name":"https://security.netapp.com/advisory/ntap-20210409-0005/","url":"https://security.netapp.com/advisory/ntap-20210409-0005/"},{"refsource":"FEDORA","name":"FEDORA-2021-fbad11014a","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/"},{"refsource":"FEDORA","name":"FEDORA-2021-d894ca87dc","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/"},{"refsource":"FEDORA","name":"FEDORA-2021-5e376c0ed9","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/"}]},"source":{"advisory":"GHSA-4cch-wxpw-8p28","discovery":"UNKNOWN"}},"nvd":{"publishedDate":"2020-12-16 01:15:00","lastModifiedDate":"2023-11-07 03:20:00","problem_types":["CWE-918"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH"},"exploitabilityScore":3.1,"impactScore":4},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:N/A:N","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:xstream_project:xstream:*:*:*:*:*:*:*:*","versionEndExcluding":"1.4.15","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"26258","Ordinal":"187680","Title":"CVE-2020-26258","CVE":"CVE-2020-26258","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"26258","Ordinal":"1","NoteData":"XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.15, a Server-Side Forgery Request vulnerability can be activated when unmarshalling. The vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.15. The reported vulnerability does not exist if running Java 15 or higher. No user is affected who followed the recommendation to setup XStream's Security Framework with a whitelist! Anyone relying on XStream's default blacklist can immediately switch to a whilelist for the allowed types to avoid the vulnerability. Users of XStream 1.4.14 or below who still want to use XStream default blacklist can use a workaround described in more detailed in the referenced advisories.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"26258","Ordinal":"2","NoteData":"2020-12-15","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"26258","Ordinal":"3","NoteData":"2021-10-29","Type":"Other","Title":"Modified"}]}}}