[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fgHnvHPCK3QiEHIyxDAJPyjPgvHphJBZ_FKpgzZVGOAM":3,"g5a-risk:CVE-2026-66066":146},{"success":4,"data":5,"meta":143},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":31,"epssPercentile":32,"epssTimeSeries":33,"severity":34,"affectedProducts":35,"affectedProductsCount":36,"references":37,"referencesCount":81,"weaknesses":82,"weaknessesCount":91,"isActivelyExploited":92,"cisaInfo":32,"otxData":32,"relatedBlogPosts":93,"seoMetadata":94,"configurations":119,"relatedVendorCves":120,"notableEvents":121},"CVE-2026-66066","What is CVE-2026-66066?","Action Pack is a framework for handling and responding to web requests. In versions prior to 7.2.3.2, 8.0.5.1 and 8.1.3.1, Active Storage does not disable libvips operations marked unsafe for untrusted content, allowing a crafted upload to invoke such an operation. Consuming applications are affected when configured to use libvips and accept image uploads from untrusted users. An unauthenticated attacker may exploit this behavior to read arbitrary files accessible to the Rails process, including environment variables and application secrets. Exposure of credentials such as secret_key_base or external-service tokens may enable remote code execution or lateral movement. This issue has been fixed in versions 7.2.3.2, 8.0.5.1 and 8.1.3.1.","Action Pack is a framework for handling and responding to web requests. In versions prior to 7.2.3.2, 8.0.5.1 and 8.1.3.1, Active Storage does not disable li...","2026-07-30T19:18:35.843","2026-09-10T20:36:14.34",9.5,"CVSS:4.0\u002FAV:N\u002FAC:L\u002FAT:P\u002FPR:N\u002FUI:N\u002FVC:H\u002FVI:H\u002FVA:H\u002FSC:H\u002FSI:H\u002FSA:H\u002FE:X\u002FCR:X\u002FIR:X\u002FAR:X\u002FMAV:X\u002FMAC:X\u002FMAT:X\u002FMPR:X\u002FMUI:X\u002FMVC:X\u002FMVI:X\u002FMVA:X\u002FMSC:X\u002FMSI:X\u002FMSA:X\u002FS:X\u002FAU:X\u002FR:X\u002FV:X\u002FRE:X\u002FU:X",{"CVSSMetricV31":15,"CVSSMetricV30":16,"CVSSMetricV2":17,"CVSSMetricV40":18},[],[],[],[19],{"Source":20,"Type":21,"CVSSData":22},"security-advisories@github.com","Secondary",{"Version":23,"VectorString":13,"BaseScore":12,"BaseSeverity":24,"AttackVector":25,"AttackComplexity":26,"AttackRequirements":27,"PrivilegesRequired":28,"UserInteraction":28,"VulnConfidentialityImpact":29,"VulnIntegrityImpact":29,"VulnAvailabilityImpact":29,"SubConfidentialityImpact":29,"SubIntegrityImpact":29,"SubAvailabilityImpact":29,"ExploitMaturity":30,"ConfidentialityRequirement":30,"IntegrityRequirement":30,"AvailabilityRequirement":30,"ModifiedAttackVector":30,"ModifiedAttackComplexity":30,"ModifiedAttackRequirements":30,"ModifiedPrivilegesRequired":30,"ModifiedUserInteraction":30,"ModifiedVulnConfidentialityImpact":30,"ModifiedVulnIntegrityImpact":30,"ModifiedVulnAvailabilityImpact":30,"ModifiedSubConfidentialityImpact":30,"ModifiedSubIntegrityImpact":30,"ModifiedSubAvailabilityImpact":30,"Safety":30,"Automatable":30,"Recovery":30,"ValueDensity":30,"VulnerabilityResponseEffort":30,"ProviderUrgency":30},"4.0","CRITICAL","NETWORK","LOW","PRESENT","NONE","HIGH","NOT_DEFINED",0.27861,null,[31,31,31,31,31,31,31],"Critical",[],0,[38,42,45,48,51,54,57,60,63,67,71,74,78],{"url":39,"source":40,"tags":41},"https:\u002F\u002Fgithub.com\u002Frails\u002Frails\u002Fcommit\u002F1c01bb587206ee6eb0e1179c2cef96a6a47acb1e","GitHub",[],{"url":43,"source":40,"tags":44},"https:\u002F\u002Fgithub.com\u002Frails\u002Frails\u002Fcommit\u002F349e7a5d5b4b715af1e416db824f3c078a7d59e5",[],{"url":46,"source":40,"tags":47},"https:\u002F\u002Fgithub.com\u002Frails\u002Frails\u002Fcommit\u002Fd79b7f4aa17dec8ce4960fef05733c8c0c7ef49a",[],{"url":49,"source":40,"tags":50},"https:\u002F\u002Fgithub.com\u002Frails\u002Frails\u002Freleases\u002Ftag\u002Fv7.2.3.2",[],{"url":52,"source":40,"tags":53},"https:\u002F\u002Fgithub.com\u002Frails\u002Frails\u002Freleases\u002Ftag\u002Fv8.0.5.1",[],{"url":55,"source":40,"tags":56},"https:\u002F\u002Fgithub.com\u002Frails\u002Frails\u002Freleases\u002Ftag\u002Fv8.1.3.1",[],{"url":58,"source":40,"tags":59},"https:\u002F\u002Fgithub.com\u002Frails\u002Frails\u002Fsecurity\u002Fadvisories\u002FGHSA-xr9x-r78c-5hrm",[],{"url":61,"source":40,"tags":62},"https:\u002F\u002Fgithub.com\u002Frubysec\u002Fruby-advisory-db\u002Fblob\u002Fmaster\u002Fgems\u002Factivestorage\u002FCVE-2026-66066.yml",[],{"url":64,"source":65,"tags":66},"https:\u002F\u002Fthehackernews.com\u002F2026\u002F07\u002Fcritical-rails-flaw-could-let.html","Thehackernews",[],{"url":68,"source":69,"tags":70},"http:\u002F\u002Fwww.openwall.com\u002Flists\u002Foss-security\u002F2026\u002F07\u002F29\u002F9","Openwall",[],{"url":72,"source":69,"tags":73},"http:\u002F\u002Fwww.openwall.com\u002Flists\u002Foss-security\u002F2026\u002F08\u002F01\u002F6",[],{"url":75,"source":76,"tags":77},"https:\u002F\u002Fethiack.com\u002Finfo-hub\u002Fresearch\u002Fkindarails2shell-rails-rce-cve-2026-66066","Ethiack",[],{"url":79,"source":40,"tags":80},"https:\u002F\u002Fgithub.com\u002Frails\u002Frails-forensics-CVE-2026-66066",[],13,[83],{"id":84,"name":85,"description":86,"extendedDescription":87,"status":88,"abstraction":89,"structure":90},"CWE-1188","Initialization of a Resource with an Insecure Default","The product initializes or sets a resource with a default that is intended to be changed by the administrator, but the default is not secure.","Developers often choose default values that leave the product as open and easy to use as possible out-of-the-box, under the assumption that the administrator can (or should) change the default value.  However, this ease-of-use comes at a cost when the default is insecure and the administrator does not change it.","Incomplete","Base","Simple",1,false,[],{"title":95,"metaDescription":96,"keywords":97,"canonicalUrl":98,"structuredData":99},"What is CVE-2026-66066? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2026-66066, a critical severity cyber security vulnerability from 2026. 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