{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42245","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-25T05:37:12.118Z","datePublished":"2026-05-09T19:37:08.905Z","dateUpdated":"2026-05-12T18:30:58.415Z"},"containers":{"cna":{"title":"net-imap: Quadratic complexity when reading response literals","problemTypes":[{"descriptions":[{"cweId":"CWE-407","lang":"en","description":"CWE-407: Inefficient Algorithmic Complexity","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":2.3,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/ruby/net-imap/security/advisories/GHSA-q2mw-fvj9-vvcw","tags":["x_refsource_CONFIRM"],"url":"https://github.com/ruby/net-imap/security/advisories/GHSA-q2mw-fvj9-vvcw"},{"name":"https://github.com/ruby/net-imap/commit/6091f7d6b1f3514cafbfe39c76f2b5d73de3ca96","tags":["x_refsource_MISC"],"url":"https://github.com/ruby/net-imap/commit/6091f7d6b1f3514cafbfe39c76f2b5d73de3ca96"},{"name":"https://github.com/ruby/net-imap/commit/88d95231fc8afef11c1f074453f7d75b68c9dfda","tags":["x_refsource_MISC"],"url":"https://github.com/ruby/net-imap/commit/88d95231fc8afef11c1f074453f7d75b68c9dfda"},{"name":"https://github.com/ruby/net-imap/commit/de685f91a4a4cc75eb80da898c2bf8af08d34819","tags":["x_refsource_MISC"],"url":"https://github.com/ruby/net-imap/commit/de685f91a4a4cc75eb80da898c2bf8af08d34819"},{"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":"2026-05-09T19:37:08.905Z"},"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, Net::IMAP::ResponseReader has quadratic time complexity when reading large responses containing many string literals. A hostile server can send responses which are crafted to exhaust the client's CPU for a denial of service attack. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4."}],"source":{"advisory":"GHSA-q2mw-fvj9-vvcw","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-12T17:53:55.917796Z","id":"CVE-2026-42245","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":"2026-05-12T18:30:58.415Z"}}]}}