[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fzjqy7z2kCxX2h_ZSkdLMAjzuFm2eQ61mzPadHjd6_oI":3,"g5a-risk:CVE-2020-26258":223},{"success":4,"data":5,"meta":221},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":46,"epssPercentile":29,"epssTimeSeries":47,"severity":48,"affectedProducts":49,"affectedProductsCount":77,"references":78,"referencesCount":140,"weaknesses":141,"weaknessesCount":150,"isActivelyExploited":151,"cisaInfo":29,"otxData":29,"relatedBlogPosts":152,"seoMetadata":153,"configurations":178,"relatedVendorCves":212,"notableEvents":213},"CVE-2020-26258","What is CVE-2020-26258?","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.","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 ac...","2020-12-16T01:15:12.333","2025-05-23T16:53:23.9",7.7,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:C\u002FC:H\u002FI:N\u002FA:N",{"CVSSMetricV31":15,"CVSSMetricV30":29,"CVSSMetricV2":37,"CVSSMetricV40":29},[16,32],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":30,"ImpactScore":31},"security-advisories@github.com","Secondary",{"Version":20,"VectorString":21,"AttackVector":22,"AttackComplexity":23,"PrivilegesRequired":24,"UserInteraction":25,"Scope":26,"ConfidentialityImpact":23,"IntegrityImpact":25,"AvailabilityImpact":25,"BaseScore":27,"BaseSeverity":28,"ExploitCodeMaturity":29,"RemediationLevel":29,"ReportConfidence":29,"TemporalScore":29,"TemporalSeverity":29,"ConfidentialityRequirement":29,"IntegrityRequirement":29,"AvailabilityRequirement":25,"ModifiedAttackVector":29,"ModifiedAttackComplexity":29,"ModifiedPrivilegesRequired":29,"ModifiedUserInteraction":29,"ModifiedScope":29,"ModifiedConfidentialityImpact":29,"ModifiedIntegrityImpact":29,"ModifiedAvailabilityImpact":29,"EnvironmentalScore":29,"EnvironmentalSeverity":29},"3.1","CVSS:3.1\u002FAV:N\u002FAC:H\u002FPR:L\u002FUI:N\u002FS:C\u002FC:H\u002FI:N\u002FA:N","NETWORK","HIGH","LOW","NONE","CHANGED",6.3,"MEDIUM",null,1.8,4,{"Source":33,"Type":34,"CVSSData":35,"ExploitabilityScore":36,"ImpactScore":31},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":22,"AttackComplexity":24,"PrivilegesRequired":24,"UserInteraction":25,"Scope":26,"ConfidentialityImpact":23,"IntegrityImpact":25,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":23,"ExploitCodeMaturity":29,"RemediationLevel":29,"ReportConfidence":29,"TemporalScore":29,"TemporalSeverity":29,"ConfidentialityRequirement":29,"IntegrityRequirement":29,"AvailabilityRequirement":25,"ModifiedAttackVector":29,"ModifiedAttackComplexity":29,"ModifiedPrivilegesRequired":29,"ModifiedUserInteraction":29,"ModifiedScope":29,"ModifiedConfidentialityImpact":29,"ModifiedIntegrityImpact":29,"ModifiedAvailabilityImpact":29,"EnvironmentalScore":29,"EnvironmentalSeverity":29},3.1,[38],{"Source":33,"Type":34,"CVSSData":39,"BaseSeverity":28,"ExploitabilityScore":44,"ImpactScore":45,"ACInsufInfo":29,"ObtainAllPrivilege":29,"ObtainUserPrivilege":29,"ObtainOtherPrivilege":29,"UserInteractionRequired":29},{"Version":40,"VectorString":41,"AccessVector":22,"AccessComplexity":24,"Authentication":25,"ConfidentialityImpact":42,"IntegrityImpact":25,"AvailabilityImpact":25,"BaseScore":43,"BaseSeverity":29,"Exploitability":29,"RemediationLevel":29,"ReportConfidence":29,"TemporalScore":29,"CollateralDamagePotential":29,"TargetDistribution":29,"ConfidentialityRequirement":29,"IntegrityRequirement":29,"AvailabilityRequirement":29,"EnvironmentalScore":29},"2.0","AV:N\u002FAC:L\u002FAu:N\u002FC:P\u002FI:N\u002FA:N","PARTIAL",5,10,2.9,0.81817,[46,46,46,46,46,46,46],"High",[50,55,58,63,66,71,74],{"vendor":51,"product":52,"version":53,"criteria":54,"vulnerable":4},"apache","struts","*","cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:*",{"vendor":56,"product":56,"version":53,"criteria":57,"vulnerable":4},"xstream","cpe:2.3:a:xstream:xstream:*:*:*:*:*:*:*:*",{"vendor":59,"product":60,"version":61,"criteria":62,"vulnerable":4},"debian","debian_linux","9.0","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",{"vendor":59,"product":60,"version":64,"criteria":65,"vulnerable":4},"10.0","cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",{"vendor":67,"product":68,"version":69,"criteria":70,"vulnerable":4},"fedoraproject","fedora","33","cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",{"vendor":67,"product":68,"version":72,"criteria":73,"vulnerable":4},"34","cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",{"vendor":67,"product":68,"version":75,"criteria":76,"vulnerable":4},"35","cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",7,[79,85,91,95,99,102,105,109,112,117,119,122,124,127,130,133,136,138],{"url":80,"source":81,"tags":82},"https:\u002F\u002Fgithub.com\u002Fx-stream\u002Fxstream\u002Fsecurity\u002Fadvisories\u002FGHSA-4cch-wxpw-8p28","GitHub",[83,84],"Mitigation","Third Party Advisory",{"url":86,"source":87,"tags":88},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fr97993e3d78e1f5389b7b172ba9f308440830ce5f051ee62714a0aa34@%3Ccommits.struts.apache.org%3E","Apache",[89,90],"Issue Tracking","Mailing List",{"url":92,"source":93,"tags":94},"https:\u002F\u002Flists.debian.org\u002Fdebian-lts-announce\u002F2020\u002F12\u002Fmsg00042.html","Debian",[90,84],{"url":96,"source":97,"tags":98},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce@lists.fedoraproject.org\u002Fmessage\u002F22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP","Fedoraproject",[90],{"url":100,"source":97,"tags":101},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce@lists.fedoraproject.org\u002Fmessage\u002FPVPHZA7VW2RRSDCOIPP2W6O5ND254TU7",[90],{"url":103,"source":97,"tags":104},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce@lists.fedoraproject.org\u002Fmessage\u002FQGXIU3YDPG6OGTDHMBLAFN7BPBERXREB",[90],{"url":106,"source":107,"tags":108},"https:\u002F\u002Fsecurity.netapp.com\u002Fadvisory\u002Fntap-20210409-0005","Netapp",[84],{"url":110,"source":93,"tags":111},"https:\u002F\u002Fwww.debian.org\u002Fsecurity\u002F2021\u002Fdsa-4828",[84],{"url":113,"source":114,"tags":115},"https:\u002F\u002Fx-stream.github.io\u002FCVE-2020-26258.html","Github",[116,83,84],"Exploit",{"url":80,"source":81,"tags":118},[83,84],{"url":120,"source":87,"tags":121},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fr97993e3d78e1f5389b7b172ba9f308440830ce5f051ee62714a0aa34%40%3Ccommits.struts.apache.org%3E",[89,90],{"url":92,"source":93,"tags":123},[90,84],{"url":125,"source":97,"tags":126},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce%40lists.fedoraproject.org\u002Fmessage\u002F22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP\u002F",[90],{"url":128,"source":97,"tags":129},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce%40lists.fedoraproject.org\u002Fmessage\u002FPVPHZA7VW2RRSDCOIPP2W6O5ND254TU7\u002F",[90],{"url":131,"source":97,"tags":132},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce%40lists.fedoraproject.org\u002Fmessage\u002FQGXIU3YDPG6OGTDHMBLAFN7BPBERXREB\u002F",[90],{"url":134,"source":107,"tags":135},"https:\u002F\u002Fsecurity.netapp.com\u002Fadvisory\u002Fntap-20210409-0005\u002F",[84],{"url":110,"source":93,"tags":137},[84],{"url":113,"source":114,"tags":139},[116,83,84],18,[142],{"id":143,"name":144,"description":145,"extendedDescription":146,"status":147,"abstraction":148,"structure":149},"CWE-918","Server-Side Request Forgery (SSRF)","The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.","By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file:\u002F\u002F), or use other protocols such as gopher:\u002F\u002F or tftp:\u002F\u002F, which may provide greater control over the contents of requests.","Incomplete","Base","Simple",1,false,[],{"title":154,"metaDescription":155,"keywords":156,"canonicalUrl":157,"structuredData":158},"What is CVE-2020-26258? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2020-26258, a high severity cyber security vulnerability from 2020. High exploit probability (81.8%). XStream is a Java library...","CVE-2020-26258, CVE-2020-26258 vulnerability, CVE-2020-26258 security, high 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-2020-26258",{"@context":159,"@type":160,"headline":154,"description":155,"datePublished":10,"dateModified":11,"author":161,"publisher":165,"about":169,"mainEntityOfPage":173,"articleSection":176,"keywords":177},"https:\u002F\u002Fschema.org","TechArticle",{"@type":162,"name":163,"url":164},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":162,"name":163,"url":164,"logo":166},{"@type":167,"url":168},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":170,"name":6,"description":171,"additionalType":172},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":174,"@id":175},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2020-26258","Cybersecurity","CVE-2020-26258, CVE-2020-26258 vulnerability, CVE-2020-26258 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[179,187,194,202],{"Operator":29,"Negate":29,"Nodes":180},[181],{"Operator":182,"Negate":29,"CPEMatch":183},"OR",[184],{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":185,"VersionStartExcluding":29,"VersionStartIncluding":29,"VersionEndExcluding":186,"VersionEndIncluding":29},"0EB036B6-1387-49B0-95B2-9C954EAC9DD9","6.0.0",{"Operator":29,"Negate":29,"Nodes":188},[189],{"Operator":182,"Negate":29,"CPEMatch":190},[191],{"Vulnerable":4,"Criteria":57,"MatchCriteriaID":192,"VersionStartExcluding":29,"VersionStartIncluding":29,"VersionEndExcluding":193,"VersionEndIncluding":29},"EED822AC-DE77-4E76-A454-95C13370BB5A","1.4.15",{"Operator":29,"Negate":29,"Nodes":195},[196],{"Operator":182,"Negate":29,"CPEMatch":197},[198,200],{"Vulnerable":4,"Criteria":62,"MatchCriteriaID":199,"VersionStartExcluding":29,"VersionStartIncluding":29,"VersionEndExcluding":29,"VersionEndIncluding":29},"DEECE5FC-CACF-4496-A3E7-164736409252",{"Vulnerable":4,"Criteria":65,"MatchCriteriaID":201,"VersionStartExcluding":29,"VersionStartIncluding":29,"VersionEndExcluding":29,"VersionEndIncluding":29},"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",{"Operator":29,"Negate":29,"Nodes":203},[204],{"Operator":182,"Negate":29,"CPEMatch":205},[206,208,210],{"Vulnerable":4,"Criteria":70,"MatchCriteriaID":207,"VersionStartExcluding":29,"VersionStartIncluding":29,"VersionEndExcluding":29,"VersionEndIncluding":29},"E460AA51-FCDA-46B9-AE97-E6676AA5E194",{"Vulnerable":4,"Criteria":73,"MatchCriteriaID":209,"VersionStartExcluding":29,"VersionStartIncluding":29,"VersionEndExcluding":29,"VersionEndIncluding":29},"A930E247-0B43-43CB-98FF-6CE7B8189835",{"Vulnerable":4,"Criteria":76,"MatchCriteriaID":211,"VersionStartExcluding":29,"VersionStartIncluding":29,"VersionEndExcluding":29,"VersionEndIncluding":29},"80E516C0-98A4-4ADE-B69F-66A772E2BAAA",[],[214],{"id":215,"eventType":216,"eventTime":217,"details":218,"label":219,"color":220},"f9b98ba5-5ac7-46bc-854a-d5168ea7c55a","LOW_EPSS_DELTA","2026-06-16T04:05:51.833958+00:00","Daily EPSS score decreased by 0.122 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":11,"cacheTime":222,"version":40},1792241523709,{"score":224,"band":225,"action":226,"scoredAt":227},64,"Medium","Plan remediation","2026-10-16T06:50:06.731088+00:00"]