CVE-2020-26259

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{"affected": [{"affectedData": [{"product": "xstream", "vendor": "x-stream", "versions": [{"status": "affected", "version": "< 1.4.15"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:*", "matchCriteriaId": "0EB036B6-1387-49B0-95B2-9C954EAC9DD9", "versionEndExcluding": "6.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:xstream:xstream:*:*:*:*:*:*:*:*", "matchCriteriaId": "EED822AC-DE77-4E76-A454-95C13370BB5A", "versionEndExcluding": "1.4.15", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*", "matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.15, is vulnerable to an Arbitrary File Deletion on the local host when unmarshalling. The vulnerability may allow a remote attacker to delete arbitrary know files on the host as log as the executing process has sufficient rights 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 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."}, {"lang": "es", "value": "XStream es una biblioteca de Java para serializar objetos a XML y viceversa.&#xa0;En XStream versiones anteriores a 1.4.15, es vulnerable a una Eliminaci\u00f3n Arbitraria de Archivos en el host local al desagrupar.&#xa0;La vulnerabilidad puede permitir a un atacante remoto eliminar archivos conocidos arbitrarios en el host como registro, ya que el proceso en ejecuci\u00f3n posee derechos suficientes solo mediante la manipulaci\u00f3n del flujo de entrada procesado.&#xa0;Si conf\u00eda en la lista negra predeterminada de XStream del Security Framework, tendr\u00e1 que usar al menos la versi\u00f3n 1.4.15.&#xa0;La vulnerabilidad reportada no se presenta al ejecutar Java versi\u00f3n 15 o superior.&#xa0;Ning\u00fan usuario est\u00e1 afectado, si sigui\u00f3 la recomendaci\u00f3n de configurar el Security Framework de XStream con una lista blanca!&#xa0;Cualquiera que conf\u00ede en la lista negra predeterminada de XStream puede cambiar inmediatamente a una lista blanca para los tipos permitidos para evitar la vulnerabilidad.&#xa0;Usuarios de XStream 1.4 o por debajo, quienes a\u00fan quieran usar la lista negra predeterminada de XStream pueden usar una soluci\u00f3n alternativa que se describe con m\u00e1s detalle en los avisos a los que se hace referencia"}], "id": "CVE-2020-26259", "lastModified": "2026-10-07T19:17:17.850", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.4, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 4.0, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2020-26259", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-07T18:40:33.453716Z", "version": "2.0.3"}}]}, "published": "2020-12-16T01:15:12.413", "references": [{"source": "security-advisories@github.com", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://github.com/x-stream/xstream/security/advisories/GHSA-jfvx-7wrx-43fh"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Mailing List"], "url": "https://lists.apache.org/thread.html/r97993e3d78e1f5389b7b172ba9f308440830ce5f051ee62714a0aa34%40%3Ccommits.struts.apache.org%3E"}, {"source": "security-advisories@github.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/12/msg00042.html"}, {"source": "security-advisories@github.com", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/"}, {"source": "security-advisories@github.com", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/"}, {"source": "security-advisories@github.com", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20210409-0005/"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-4828"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Third Party Advisory"], "url": "https://x-stream.github.io/CVE-2020-26259.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://github.com/x-stream/xstream/security/advisories/GHSA-jfvx-7wrx-43fh"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Mailing List"], "url": "https://lists.apache.org/thread.html/r97993e3d78e1f5389b7b172ba9f308440830ce5f051ee62714a0aa34%40%3Ccommits.struts.apache.org%3E"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/12/msg00042.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20210409-0005/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-4828"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mitigation", "Third Party Advisory"], "url": "https://x-stream.github.io/CVE-2020-26259.html"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-78"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2021:2139", "cpe": "cpe:/a:redhat:jboss_data_grid:8", "package": "xstream", "product_name": "Red Hat Data Grid 8.2.0", "release_date": "2021-05-26T00:00:00Z"}, {"advisory": "RHSA-2021:5134", "cpe": "cpe:/a:redhat:jboss_fuse:7", "package": "xstream", "product_name": "Red Hat Fuse 7.10", "release_date": "2021-12-14T00:00:00Z"}, {"advisory": "RHSA-2021:3205", "cpe": "cpe:/a:redhat:integration:1", "product_name": "Red Hat Integration", "release_date": "2021-08-18T00:00:00Z"}, {"advisory": "RHSA-2021:4767", "cpe": "cpe:/a:redhat:camel_quarkus:2.2", "impact": "moderate", "package": "xstream", "product_name": "Red Hat Integration Camel Quarkus 1", "release_date": "2021-11-23T00:00:00Z"}, {"advisory": "RHSA-2021:2476", "cpe": "cpe:/a:redhat:jboss_enterprise_brms_platform:7.11", "package": "xstream", "product_name": "RHDM 7.11.0", "release_date": "2021-06-17T00:00:00Z"}, {"advisory": "RHSA-2021:2475", "cpe": "cpe:/a:redhat:jboss_enterprise_bpms_platform:7.11", "package": "xstream", "product_name": "RHPAM 7.11.0", "release_date": "2021-06-17T00:00:00Z"}], "bugzilla": {"description": "XStream: arbitrary file deletion on the local host when unmarshalling", "id": "1908837", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1908837"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N", "status": "verified"}, "cwe": "CWE-78", "details": ["XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.15, is vulnerable to an Arbitrary File Deletion on the local host when unmarshalling. The vulnerability may allow a remote attacker to delete arbitrary know files on the host as log as the executing process has sufficient rights 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 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."], "mitigation": {"lang": "en:us", "value": "As recommended, use XStream's security framework to implement a whitelist for the allowed types.\nUsers of XStream 1.4.14 who insist to use XStream default blacklist - despite that clear recommendation - can simply add two lines to XStream's setup code:\nxstream.denyTypes(new String[]{ \"jdk.nashorn.internal.objects.NativeString\" });\nxstream.denyTypesByRegExp(new String[]{ \".*\\\\.ReadAllStream\\\\$FileStream\" });\nUsers of XStream 1.4.13 who want to use XStream default blacklist can simply add three lines to XStream's setup code:\nxstream.denyTypes(new String[]{ \"javax.imageio.ImageIO$ContainsFilter\", \"jdk.nashorn.internal.objects.NativeString\" });\nxstream.denyTypes(new Class[]{ java.lang.ProcessBuilder.class });\nxstream.denyTypesByRegExp(new String[]{ \".*\\\\.ReadAllStream\\\\$FileStream\" });\nUsers of XStream 1.4.12 to 1.4.7 who want to use XStream with a blacklist will have to setup such a list from scratch and deny at least the following types: javax.imageio.ImageIO$ContainsFilter, java.beans.EventHandler, java.lang.ProcessBuilder, jdk.nashorn.internal.objects.NativeString, java.lang.Void and void and deny several types by name pattern.\nxstream.denyTypes(new String[]{ \"javax.imageio.ImageIO$ContainsFilter\", \"jdk.nashorn.internal.objects.NativeString\" });\nxstream.denyTypes(new Class[]{ java.lang.ProcessBuilder.class, java.beans.EventHandler.class, java.lang.ProcessBuilder.class, java.lang.Void.class, void.class });\nxstream.denyTypesByRegExp(new String[]{ \".*\\\\$LazyIterator\", \"javax\\\\.crypto\\\\..*\", \".*\\\\.ReadAllStream\\\\$FileStream\" });\nUsers of XStream 1.4.6 or below can register an own converter to prevent the unmarshalling of the currently know critical types of the Java runtime. It is in fact an updated version of the workaround for CVE-2013-7285:\nxstream.registerConverter(new Converter() {\npublic boolean canConvert(Class type) {\nreturn type != null && (type == java.beans.EventHandler.class || type == java.lang.ProcessBuilder.class\n|| type.getName().equals(\"javax.imageio.ImageIO$ContainsFilter\") || type.getName().equals(\"jdk.nashorn.internal.objects.NativeString\")\n|| type == java.lang.Void.class || void.class || Proxy.isProxy(type)\n|| type.getName().startsWith(\"javax.crypto.\") || type.getName().endsWith(\"$LazyIterator\") || type.getName().endsWith(\".ReadAllStream$FileStream\"));\n}\npublic Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {\nthrow new ConversionException(\"Unsupported type due to security reasons.\");\n}\npublic void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {\nthrow new ConversionException(\"Unsupported type due to security reasons.\");\n}\n}, XStream.PRIORITY_LOW);"}, "name": "CVE-2020-26259", "package_state": [{"cpe": "cpe:/a:redhat:jboss_enterprise_bpms_platform", "fix_state": "Out of support scope", "package_name": "xstream", "product_name": "Red Hat BPM Suite 6"}, {"cpe": "cpe:/a:redhat:jboss_developer_studio:12.", "fix_state": "Affected", "package_name": "xstream", "product_name": "Red Hat CodeReady Studio 12"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "xstream", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:integration:1", "fix_state": "Affected", "package_name": "xstream", "product_name": "Red Hat Integration Camel K 1"}, {"cpe": "cpe:/a:redhat:jboss_amq:6", "fix_state": "Out of support scope", "package_name": "xstream", "product_name": "Red Hat JBoss A-MQ 6"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_brms_platform:6", "fix_state": "Out of support scope", "package_name": "xstream", "product_name": "Red Hat JBoss BRMS 6"}, {"cpe": "cpe:/a:redhat:jboss_data_grid:7", "fix_state": "Out of support scope", "package_name": "xstream", "product_name": "Red Hat JBoss Data Grid 7"}, {"cpe": "cpe:/a:redhat:jboss_data_virtualization:6", "fix_state": "Out of support scope", "package_name": "xstream", "product_name": "Red Hat JBoss Data Virtualization 6"}, {"cpe": "cpe:/a:redhat:jboss_fuse:6", "fix_state": "Out of support scope", "package_name": "xstream", "product_name": "Red Hat JBoss Fuse 6"}, {"cpe": "cpe:/a:redhat:jboss_fuse_service_works:6", "fix_state": "Out of support scope", "package_name": "xstream", "product_name": "Red Hat JBoss Fuse Service Works 6"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_soa_platform:5", "fix_state": "Out of support scope", "package_name": "xstream", "product_name": "Red Hat JBoss SOA Platform 5"}, {"cpe": "cpe:/a:redhat:openshift:3.11", "fix_state": "Not affected", "package_name": "jenkins", "product_name": "Red Hat OpenShift Container Platform 3.11"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "jenkins", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2020-12-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-26259\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-26259"], "statement": "OpenShift Container Platform (OCP) delivers jenkins package with bundled XStream library. Due to JEP-200 Jenkins project [1] and advisory SECURITY-383 [2], OCP jenkins package is not affected by this flaw.\n[1] https://github.com/jenkinsci/jep/blob/master/jep/200/README.adoc\n[2] https://www.jenkins.io/security/advisory/2017-02-01/ (see SECURITY-383 / CVE-2017-2608)", "threat_severity": "Moderate"}

{}