{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42257","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-26T11:53:27.704Z","datePublished":"2026-05-09T19:39:48.398Z","dateUpdated":"2026-05-13T19:33:13.948Z"},"containers":{"cna":{"title":"net-imap: Command Injection via \"raw\" arguments to multiple commands","problemTypes":[{"descriptions":[{"cweId":"CWE-93","lang":"en","description":"CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-77","lang":"en","description":"CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.8,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/ruby/net-imap/security/advisories/GHSA-hm49-wcqc-g2xg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/ruby/net-imap/security/advisories/GHSA-hm49-wcqc-g2xg"},{"name":"https://github.com/ruby/net-imap/releases/tag/v0.4.24","tags":["x_refsource_MISC"],"url":"https://github.com/ruby/net-imap/releases/tag/v0.4.24"},{"name":"https://github.com/ruby/net-imap/releases/tag/v0.5.14","tags":["x_refsource_MISC"],"url":"https://github.com/ruby/net-imap/releases/tag/v0.5.14"},{"name":"https://github.com/ruby/net-imap/releases/tag/v0.6.4","tags":["x_refsource_MISC"],"url":"https://github.com/ruby/net-imap/releases/tag/v0.6.4"}],"affected":[{"vendor":"ruby","product":"net-imap","versions":[{"version":"< 0.4.24","status":"affected"},{"version":">= 0.5.0, < 0.5.14","status":"affected"},{"version":">= 0.6.0, < 0.6.4","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-05-09T19:39:48.398Z"},"descriptions":[{"lang":"en","value":"Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4."}],"source":{"advisory":"GHSA-hm49-wcqc-g2xg","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-13T19:27:16.888782Z","id":"CVE-2026-42257","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-13T19:33:13.948Z"}}]}}