CVE-2026-42246

{"id": "CVE-2026-42246", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.2}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 7.6, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-05-09T20:16:28.163", "references": [{"url": "https://github.com/ruby/net-imap/commit/0ede4c40b1523dfeaf95777b2678e54cc0fd9618", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ruby/net-imap/commit/24a4e770b43230286a05aa2a9746cdbb3eb8485e", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ruby/net-imap/commit/97e2488fb5401a1783bddd959dde007d9fbce42c", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ruby/net-imap/commit/f79d35bf5833f186e81044c57c843eda30c873da", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ruby/net-imap/releases/tag/v0.3.10", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ruby/net-imap/releases/tag/v0.4.24", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ruby/net-imap/releases/tag/v0.5.14", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ruby/net-imap/security/advisories/GHSA-vcgp-9326-pqcp", "tags": ["Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-392"}, {"lang": "en", "value": "CWE-393"}, {"lang": "en", "value": "CWE-636"}, {"lang": "en", "value": "CWE-754"}, {"lang": "en", "value": "CWE-841"}]}], "descriptions": [{"lang": "en", "value": "Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return \"successfully\", without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4."}], "lastModified": "2026-05-18T18:08:40.813", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ruby-lang:net\\:\\:imap:*:*:*:*:*:ruby:*:*", "vulnerable": true, "matchCriteriaId": "E2B6117A-DE77-4BB9-A73C-F20933514BAB", "versionEndExcluding": "0.3.10"}, {"criteria": "cpe:2.3:a:ruby-lang:net\\:\\:imap:*:*:*:*:*:ruby:*:*", "vulnerable": true, "matchCriteriaId": "79EE9345-B825-40F9-9CFF-9E9E1A3783DD", "versionEndExcluding": "0.4.24", "versionStartIncluding": "0.4.0"}, {"criteria": "cpe:2.3:a:ruby-lang:net\\:\\:imap:*:*:*:*:*:ruby:*:*", "vulnerable": true, "matchCriteriaId": "2CCEB891-1D8F-4431-A79C-2A7560A84F4E", "versionEndExcluding": "0.5.14", "versionStartIncluding": "0.5.0"}, {"criteria": "cpe:2.3:a:ruby-lang:net\\:\\:imap:*:*:*:*:*:ruby:*:*", "vulnerable": true, "matchCriteriaId": "9A6D1995-BFA3-490F-967D-252CA7BE2264", "versionEndExcluding": "0.6.4", "versionStartIncluding": "0.6.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}