{"id":"CVE-2026-47240","summary":"Net::IMAP: Command Injection via non-synchronizing literal in \"raw\" argument","details":"Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a \"raw data\" argument that is sent verbatim after validation to prevent command injection. However, if a server does not support non-synchronizing literals, it may still be possible to inject arbitrary IMAP commands inside non-synchronizing literals.  A server without support for non-synchronizing literals may interpret the \"+}\\r\\n\" as the end of a malformed command line and respond with a tagged BAD. In that case, the contents of the literal will be interpreted as one or more new pipelined commands, allowing a CRLF command injection attack to succeed. This affects criteria for #search and #uid_search; search_keys for #sort, #thread, #uid_sort, and #uid_thread; and attr for #fetch and #uid_fetch. This vulnerability is fixed in 0.6.5 and 0.5.15.","aliases":["GHSA-8p34-64r3-mwg8"],"modified":"2026-07-08T08:05:18.112891186Z","published":"2026-06-22T20:17:15.376Z","related":["CGA-v4xc-fxjj-9w6p"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47240.json","cwe_ids":["CWE-77","CWE-93"],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47240.json"},{"type":"ADVISORY","url":"https://github.com/ruby/net-imap/security/advisories/GHSA-8p34-64r3-mwg8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47240"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ruby/net-imap","events":[{"introduced":"567518cae5500f7c4776a1fd4e9bbd599e98b9bf"},{"fixed":"357f3b5aee4d2140635b6ba242fbb952491e2d28"},{"introduced":"0"},{"fixed":"ce20fc8e9974ed87d0848dc411eef490623cdeb9"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0.6.0"},{"fixed":"0.6.4.1"},{"introduced":"0"},{"fixed":"0.5.15"}]}}],"versions":["v0.5.14","v0.6.4","v0.5.13","v0.6.2","v0.6.0","v0.5.12","v0.5.11","v0.5.10","v0.5.9","v0.5.8","v0.5.7","v0.5.6","v0.5.5","v0.5.4","v0.5.3","v0.5.2","v0.5.1","v0.5.0","v0.4.14","v0.4.13","v0.4.12","v0.4.11","v0.4.10","v0.4.9","v0.3.4","v0.2.3","v0.4.8","v0.4.7","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.2","v0.2.1","v0.2.0","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47240.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}