[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f7p7YOBU4Sgy5ZtovxI8TINQWnMFWzdrvo4dmzYsG73s":3,"g5a-risk:CVE-2020-26950":143},{"success":4,"data":5,"meta":141},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":40,"epssPercentile":27,"epssTimeSeries":41,"severity":42,"affectedProducts":43,"affectedProductsCount":55,"references":56,"referencesCount":55,"weaknesses":73,"weaknessesCount":82,"isActivelyExploited":83,"cisaInfo":27,"otxData":27,"relatedBlogPosts":84,"seoMetadata":85,"configurations":110,"relatedVendorCves":125,"notableEvents":126},"CVE-2020-26950","What is CVE-2020-26950?","In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox \u003C 82.0.3, Firefox ESR \u003C 78.4.1, and Thunderbird \u003C 78.4.2.","In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulner...","2020-12-09T01:15:12.503","2022-04-08T11:28:19.07",8.8,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:R\u002FS:U\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":27,"CVSSMetricV2":30,"CVSSMetricV40":27},[16],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":28,"ImpactScore":29},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":24,"Scope":25,"ConfidentialityImpact":26,"IntegrityImpact":26,"AvailabilityImpact":26,"BaseScore":12,"BaseSeverity":26,"ExploitCodeMaturity":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"TemporalSeverity":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":26,"ModifiedAttackVector":27,"ModifiedAttackComplexity":27,"ModifiedPrivilegesRequired":27,"ModifiedUserInteraction":27,"ModifiedScope":27,"ModifiedConfidentialityImpact":27,"ModifiedIntegrityImpact":27,"ModifiedAvailabilityImpact":27,"EnvironmentalScore":27,"EnvironmentalSeverity":27},"3.1","NETWORK","LOW","NONE","REQUIRED","UNCHANGED","HIGH",null,2.8,5.9,[31],{"Source":17,"Type":18,"CVSSData":32,"BaseSeverity":26,"ExploitabilityScore":38,"ImpactScore":39,"ACInsufInfo":27,"ObtainAllPrivilege":27,"ObtainUserPrivilege":27,"ObtainOtherPrivilege":27,"UserInteractionRequired":4},{"Version":33,"VectorString":34,"AccessVector":21,"AccessComplexity":35,"Authentication":23,"ConfidentialityImpact":36,"IntegrityImpact":36,"AvailabilityImpact":36,"BaseScore":37,"BaseSeverity":27,"Exploitability":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"CollateralDamagePotential":27,"TargetDistribution":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":27,"EnvironmentalScore":27},"2.0","AV:N\u002FAC:M\u002FAu:N\u002FC:C\u002FI:C\u002FA:C","MEDIUM","COMPLETE",9.3,8.6,10,0.42327,[40,40,40,40,40,40,40],"High",[44,49,52],{"vendor":45,"product":46,"version":47,"criteria":48,"vulnerable":4},"mozilla","firefox","*","cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",{"vendor":45,"product":50,"version":47,"criteria":51,"vulnerable":4},"firefox_esr","cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*",{"vendor":45,"product":53,"version":47,"criteria":54,"vulnerable":4},"thunderbird","cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",3,[57,64,70],{"url":58,"source":59,"tags":60},"http:\u002F\u002Fpacketstormsecurity.com\u002Ffiles\u002F166175\u002FFirefox-MCallGetProperty-Write-Side-Effects-Use-After-Free.html","Packetstormsecurity",[61,62,63],"Exploit","Third Party Advisory","VDB Entry",{"url":65,"source":66,"tags":67},"https:\u002F\u002Fbugzilla.mozilla.org\u002Fshow_bug.cgi?id=1675905","Mozilla",[61,68,69],"Issue Tracking","Vendor Advisory",{"url":71,"source":66,"tags":72},"https:\u002F\u002Fwww.mozilla.org\u002Fsecurity\u002Fadvisories\u002Fmfsa2020-49\u002F",[69],[74],{"id":75,"name":76,"description":77,"extendedDescription":78,"status":79,"abstraction":80,"structure":81},"CWE-416","Use After Free","The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","","Stable","Variant","Simple",1,false,[],{"title":86,"metaDescription":87,"keywords":88,"canonicalUrl":89,"structuredData":90},"What is CVE-2020-26950? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2020-26950, a high severity cyber security vulnerability from 2020. High exploit probability (42.3%). In certain circumstances,...","CVE-2020-26950, CVE-2020-26950 vulnerability, CVE-2020-26950 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, mozilla security, firefox vulnerability, firefox_esr vulnerability, thunderbird vulnerability, high risk vulnerability, actively exploited, exploit available","\u002Fwhat-is\u002Fcve-2020-26950",{"@context":91,"@type":92,"headline":86,"description":87,"datePublished":10,"dateModified":11,"author":93,"publisher":97,"about":101,"mainEntityOfPage":105,"articleSection":108,"keywords":109},"https:\u002F\u002Fschema.org","TechArticle",{"@type":94,"name":95,"url":96},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":94,"name":95,"url":96,"logo":98},{"@type":99,"url":100},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":102,"name":6,"description":103,"additionalType":104},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":106,"@id":107},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2020-26950","Cybersecurity","CVE-2020-26950, CVE-2020-26950 vulnerability, CVE-2020-26950 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[111],{"Operator":27,"Negate":27,"Nodes":112},[113],{"Operator":114,"Negate":27,"CPEMatch":115},"OR",[116,119,122],{"Vulnerable":4,"Criteria":48,"MatchCriteriaID":117,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":118,"VersionEndIncluding":27},"7F743C78-6F4E-4BD7-A878-B887A2C42BDC","82.0.3",{"Vulnerable":4,"Criteria":51,"MatchCriteriaID":120,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":121,"VersionEndIncluding":27},"08D6779A-1193-446D-AE3E-D859D539A170","78.4.1",{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":123,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":124,"VersionEndIncluding":27},"635C87C4-E16B-4320-A339-45C8E1DF0401","78.4.2",[],[127,134],{"id":128,"eventType":129,"eventTime":130,"details":131,"label":132,"color":133},"44b7436b-3721-4035-bcf1-53d6f62b1f06","HIGH_EPSS_DELTA","2025-06-11T10:10:55.123107+00:00","Daily EPSS score increased by 0.209 on 2023-12-30","EPSS Score Increased","red",{"id":135,"eventType":136,"eventTime":137,"details":138,"label":139,"color":140},"1e13652a-b958-4e99-b0c0-0eeecdc62060","LOW_EPSS_DELTA","2025-11-15T04:05:28.178564+00:00","Daily EPSS score decreased by 0.291 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":11,"cacheTime":142,"version":33},1792348062118,{"score":144,"band":145,"action":146,"scoredAt":147},54,"Medium","Plan remediation","2026-10-16T06:50:01.572581+00:00"]