{"id":"CVE-2026-42258","aliases":["GHSA-75xq-5h9v-w6px"],"url":"https://o3.security/vulnerability/CVE-2026-42258","summary":"net-imap: Command Injection via unvalidated Symbol inputs","details":"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, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP Command injection via Symbol arguments passed to IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.","published":"2026-05-09T19:40:49.405Z","modified":"2026-08-07T11:50:46.701318361Z","cvss":null,"epss":{"score":0.00783,"percentile":0.52613,"asOf":"2026-08-09"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"net-imap","fixedVersion":"0.6.4"},{"ecosystem":"RubyGems","name":"net-imap","fixedVersion":"0.5.14"},{"ecosystem":"RubyGems","name":"net-imap","fixedVersion":"0.4.24"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/ruby/net-imap/releases/tag/v0.4.24"},{"type":"WEB","url":"https://github.com/ruby/net-imap/releases/tag/v0.5.14"},{"type":"WEB","url":"https://github.com/ruby/net-imap/releases/tag/v0.6.4"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42258.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33462"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33512"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33514"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33515"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33540"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33565"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33576"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33577"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33630"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34076"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:35834"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:35866"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:35867"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:35895"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36099"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36978"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37238"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37397"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:38694"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40380"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-42258"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42258.json"},{"type":"ADVISORY","url":"https://github.com/ruby/net-imap/security/advisories/GHSA-75xq-5h9v-w6px"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42258"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2468498"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:50:46.701318361Z"}}