[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f115cyXs1-E_Rq2iALN22k2UWg0QKtHtjgO6N2JAB0VI":3,"g5a-risk:CVE-2020-26259":208},{"success":4,"data":5,"meta":206},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":43,"epssPercentile":26,"epssTimeSeries":44,"severity":45,"affectedProducts":46,"affectedProductsCount":74,"references":75,"referencesCount":132,"weaknesses":133,"weaknessesCount":142,"isActivelyExploited":143,"cisaInfo":26,"otxData":26,"relatedBlogPosts":144,"seoMetadata":145,"configurations":170,"relatedVendorCves":204,"notableEvents":205},"CVE-2020-26259","What is CVE-2020-26259?","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.","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 lo...","2020-12-16T01:15:12.413","2025-05-23T16:54:02.297",6.8,"CVSS:3.1\u002FAV:N\u002FAC:H\u002FPR:N\u002FUI:N\u002FS:C\u002FC:N\u002FI:H\u002FA:N",{"CVSSMetricV31":15,"CVSSMetricV30":26,"CVSSMetricV2":33,"CVSSMetricV40":26},[16,29],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":27,"ImpactScore":28},"security-advisories@github.com","Secondary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":23,"IntegrityImpact":22,"AvailabilityImpact":23,"BaseScore":12,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":23,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},"3.1","NETWORK","HIGH","NONE","CHANGED","MEDIUM",null,2.2,4,{"Source":30,"Type":31,"CVSSData":32,"ExploitabilityScore":27,"ImpactScore":28},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":23,"IntegrityImpact":22,"AvailabilityImpact":23,"BaseScore":12,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":23,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},[34],{"Source":30,"Type":31,"CVSSData":35,"BaseSeverity":25,"ExploitabilityScore":41,"ImpactScore":42,"ACInsufInfo":26,"ObtainAllPrivilege":26,"ObtainUserPrivilege":26,"ObtainOtherPrivilege":26,"UserInteractionRequired":26},{"Version":36,"VectorString":37,"AccessVector":21,"AccessComplexity":38,"Authentication":23,"ConfidentialityImpact":23,"IntegrityImpact":39,"AvailabilityImpact":39,"BaseScore":40,"BaseSeverity":26,"Exploitability":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"CollateralDamagePotential":26,"TargetDistribution":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":26,"EnvironmentalScore":26},"2.0","AV:N\u002FAC:L\u002FAu:N\u002FC:N\u002FI:P\u002FA:P","LOW","PARTIAL",6.4,10,4.9,0.82392,[43,43,43,43,43,43,43],"Medium",[47,52,55,60,63,68,71],{"vendor":48,"product":49,"version":50,"criteria":51,"vulnerable":4},"apache","struts","*","cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:*",{"vendor":53,"product":53,"version":50,"criteria":54,"vulnerable":4},"xstream","cpe:2.3:a:xstream:xstream:*:*:*:*:*:*:*:*",{"vendor":56,"product":57,"version":58,"criteria":59,"vulnerable":4},"debian","debian_linux","9.0","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",{"vendor":56,"product":57,"version":61,"criteria":62,"vulnerable":4},"10.0","cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",{"vendor":64,"product":65,"version":66,"criteria":67,"vulnerable":4},"fedoraproject","fedora","33","cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",{"vendor":64,"product":65,"version":69,"criteria":70,"vulnerable":4},"34","cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",{"vendor":64,"product":65,"version":72,"criteria":73,"vulnerable":4},"35","cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",7,[76,82,88,92,96,99,102,106,109,114,116,118,120,122,124,126,128,130],{"url":77,"source":78,"tags":79},"https:\u002F\u002Fgithub.com\u002Fx-stream\u002Fxstream\u002Fsecurity\u002Fadvisories\u002FGHSA-jfvx-7wrx-43fh","GitHub",[80,81],"Mitigation","Third Party Advisory",{"url":83,"source":84,"tags":85},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fr97993e3d78e1f5389b7b172ba9f308440830ce5f051ee62714a0aa34%40%3Ccommits.struts.apache.org%3E","Apache",[86,87],"Issue Tracking","Mailing List",{"url":89,"source":90,"tags":91},"https:\u002F\u002Flists.debian.org\u002Fdebian-lts-announce\u002F2020\u002F12\u002Fmsg00042.html","Debian",[87,81],{"url":93,"source":94,"tags":95},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce%40lists.fedoraproject.org\u002Fmessage\u002F22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP\u002F","Fedoraproject",[87],{"url":97,"source":94,"tags":98},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce%40lists.fedoraproject.org\u002Fmessage\u002FPVPHZA7VW2RRSDCOIPP2W6O5ND254TU7\u002F",[87],{"url":100,"source":94,"tags":101},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce%40lists.fedoraproject.org\u002Fmessage\u002FQGXIU3YDPG6OGTDHMBLAFN7BPBERXREB\u002F",[87],{"url":103,"source":104,"tags":105},"https:\u002F\u002Fsecurity.netapp.com\u002Fadvisory\u002Fntap-20210409-0005\u002F","Netapp",[81],{"url":107,"source":90,"tags":108},"https:\u002F\u002Fwww.debian.org\u002Fsecurity\u002F2021\u002Fdsa-4828",[81],{"url":110,"source":111,"tags":112},"https:\u002F\u002Fx-stream.github.io\u002FCVE-2020-26259.html","Github",[113,80,81],"Exploit",{"url":77,"source":78,"tags":115},[80,81],{"url":83,"source":84,"tags":117},[86,87],{"url":89,"source":90,"tags":119},[87,81],{"url":93,"source":94,"tags":121},[87],{"url":97,"source":94,"tags":123},[87],{"url":100,"source":94,"tags":125},[87],{"url":103,"source":104,"tags":127},[81],{"url":107,"source":90,"tags":129},[81],{"url":110,"source":111,"tags":131},[113,80,81],18,[134],{"id":135,"name":136,"description":137,"extendedDescription":138,"status":139,"abstraction":140,"structure":141},"CWE-78","Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.","This weakness can lead to a vulnerability in environments in which the attacker does not have direct access to the operating system, such as in web applications. Alternately, if the weakness occurs in a privileged program, it could allow the attacker to specify commands that normally would not be accessible, or to call alternate commands with privileges that the attacker does not have. The problem is exacerbated if the compromised process does not follow the principle of least privilege, because the attacker-controlled commands may run with special system privileges that increases the amount of damage.\nThere are at least two subtypes of OS command injection:\nFrom a weakness standpoint, these variants represent distinct programmer errors. In the first variant, the programmer clearly intends that input from untrusted parties will be part of the arguments in the command to be executed. In the second variant, the programmer does not intend for the command to be accessible to any untrusted party, but the programmer probably has not accounted for alternate ways in which malicious attackers can provide input.","Stable","Base","Simple",1,false,[],{"title":146,"metaDescription":147,"keywords":148,"canonicalUrl":149,"structuredData":150},"What is CVE-2020-26259? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2020-26259, a medium severity cyber security vulnerability from 2020. High exploit probability (82.4%). XStream is a Java libra...","CVE-2020-26259, CVE-2020-26259 vulnerability, CVE-2020-26259 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2020, CVSS score, exploit, patch, remediation, apache security, xstream security, debian security, fedoraproject security, struts vulnerability, xstream vulnerability, debian_linux vulnerability, fedora vulnerability","\u002Fwhat-is\u002Fcve-2020-26259",{"@context":151,"@type":152,"headline":146,"description":147,"datePublished":10,"dateModified":11,"author":153,"publisher":157,"about":161,"mainEntityOfPage":165,"articleSection":168,"keywords":169},"https:\u002F\u002Fschema.org","TechArticle",{"@type":154,"name":155,"url":156},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":154,"name":155,"url":156,"logo":158},{"@type":159,"url":160},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":162,"name":6,"description":163,"additionalType":164},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":166,"@id":167},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2020-26259","Cybersecurity","CVE-2020-26259, CVE-2020-26259 vulnerability, CVE-2020-26259 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[171,179,186,194],{"Operator":26,"Negate":26,"Nodes":172},[173],{"Operator":174,"Negate":26,"CPEMatch":175},"OR",[176],{"Vulnerable":4,"Criteria":51,"MatchCriteriaID":177,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":178,"VersionEndIncluding":26},"0EB036B6-1387-49B0-95B2-9C954EAC9DD9","6.0.0",{"Operator":26,"Negate":26,"Nodes":180},[181],{"Operator":174,"Negate":26,"CPEMatch":182},[183],{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":184,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":185,"VersionEndIncluding":26},"EED822AC-DE77-4E76-A454-95C13370BB5A","1.4.15",{"Operator":26,"Negate":26,"Nodes":187},[188],{"Operator":174,"Negate":26,"CPEMatch":189},[190,192],{"Vulnerable":4,"Criteria":59,"MatchCriteriaID":191,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":26},"DEECE5FC-CACF-4496-A3E7-164736409252",{"Vulnerable":4,"Criteria":62,"MatchCriteriaID":193,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":26},"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",{"Operator":26,"Negate":26,"Nodes":195},[196],{"Operator":174,"Negate":26,"CPEMatch":197},[198,200,202],{"Vulnerable":4,"Criteria":67,"MatchCriteriaID":199,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":26},"E460AA51-FCDA-46B9-AE97-E6676AA5E194",{"Vulnerable":4,"Criteria":70,"MatchCriteriaID":201,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":26},"A930E247-0B43-43CB-98FF-6CE7B8189835",{"Vulnerable":4,"Criteria":73,"MatchCriteriaID":203,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":26},"80E516C0-98A4-4ADE-B69F-66A772E2BAAA",[],[],{"lastModified":11,"cacheTime":207,"version":36},1792241523405,{"score":209,"band":45,"action":210,"scoredAt":211},61,"Plan remediation","2026-10-16T06:50:06.732336+00:00"]