{"id":"CVE-2020-26217","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-26217","generatedAt":"2026-11-05T01:51:20.499Z","title":"XStream before version 1.4.14 is vulnerable to Remote Code Execution.The vulnerability may allow a remote attacker to run arbitrary shell commands only by manipulating the processed input stream.","description":"XStream before version 1.4.14 is vulnerable to Remote Code Execution.The vulnerability may allow a remote attacker to run arbitrary shell commands only by manipulating the processed input stream. Only users who rely on blocklists are affected. Anyone using XStream's Security Framework allowlist is not affected. The linked advisory provides code workarounds for users who cannot upgrade. The issue is fixed in version 1.4.14.","published":"2020-11-16T21:15:13.000Z","lastModified":"2026-10-07T19:17:17.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-78"],"affected":["xstream/xstream","debian/debian linux","netapp/snapmanager","apache/activemq","oracle/banking cash management","oracle/banking corporate lending process management","oracle/banking credit facilities process management","oracle/banking platform","oracle/banking supply chain finance","oracle/banking trade finance process management","oracle/banking virtual account management","oracle/business activity monitoring","oracle/communications policy management","oracle/endeca information discovery studio","oracle/retail xstore point of service"],"epss":{"score":0.82717,"percentile":0.99669,"date":"2026-11-03","history":[{"date":"2026-10-22","score":0.82717,"percentile":0.99669}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 82.7%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://github.com/x-stream/xstream/commit/0fec095d534126931c99fd38e9c6d41f5c685c1a","tags":["Patch","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/x-stream/xstream/security/advisories/GHSA-mw36-7c6c-q4q2","tags":["Mitigation","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r2de526726e7f4db4a7cb91b7355070779f51a84fd985c6529c2f4e9e%40%3Cissues.activemq.apache.org%3E","tags":["Issue Tracking","Mailing List"],"source":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r7c9fc255edc0b9cd9567093d131f6d33fde4c662aaf912460ef630e9%40%3Ccommits.camel.apache.org%3E","tags":["Issue Tracking","Mailing List"],"source":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/r826a006fda71cc96fc87b6eca4b5d195f19a292ad36cea501682c38c%40%3Cissues.activemq.apache.org%3E","tags":["Issue Tracking","Mailing List"],"source":"security-advisories@github.com"},{"url":"https://lists.apache.org/thread.html/redde3609b89b2a4ff18b536a06ef9a77deb93d47fda8ed28086fa8c3%40%3Cissues.activemq.apache.org%3E","tags":["Issue Tracking","Mailing List"],"source":"security-advisories@github.com"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00001.html","tags":["Mailing List","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://security.netapp.com/advisory/ntap-20210409-0004/","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://www.debian.org/security/2020/dsa-4811","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","tags":["Patch","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://www.oracle.com/security-alerts/cpuApr2021.html","tags":["Patch","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://www.oracle.com/security-alerts/cpuapr2022.html","tags":["Not Applicable","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://www.oracle.com/security-alerts/cpujan2022.html","tags":["Not Applicable","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://www.oracle.com/security-alerts/cpuoct2021.html","tags":["Patch","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://x-stream.github.io/CVE-2020-26217.html","tags":["Exploit","Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/x-stream/xstream/commit/0fec095d534126931c99fd38e9c6d41f5c685c1a","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/x-stream/xstream/security/advisories/GHSA-mw36-7c6c-q4q2","tags":["Mitigation","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r2de526726e7f4db4a7cb91b7355070779f51a84fd985c6529c2f4e9e%40%3Cissues.activemq.apache.org%3E","tags":["Issue Tracking","Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r7c9fc255edc0b9cd9567093d131f6d33fde4c662aaf912460ef630e9%40%3Ccommits.camel.apache.org%3E","tags":["Issue Tracking","Mailing 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Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpuApr2021.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpuapr2022.html","tags":["Not Applicable","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpujan2022.html","tags":["Not Applicable","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpuoct2021.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://x-stream.github.io/CVE-2020-26217.html","tags":["Exploit","Mitigation","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-26217","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."}