{"action":"Upgrade net-imap to 0.4.24 or later.","affected":[{"fixed":"0.6.4","introduced":"0.6.0"},{"fixed":"0.5.14","introduced":"0.5.0"},{"fixed":"0.4.24","introduced":"0"}],"component":"net-imap","cve_ids":["CVE-2026-42258"],"ecosystem":"RubyGems","epss":0.00783,"exploited":false,"fixed_versions":["0.6.4","0.5.14","0.4.24"],"ghsa_id":"GHSA-75xq-5h9v-w6px","id":"tcs_01M5KEHJPK5JDZK5B78X3R13AV","modified_at":"2026-09-10T03:50:46.299743607Z","published_at":"2026-05-04T22:04:08Z","references":["https://osv.dev/vulnerability/GHSA-75xq-5h9v-w6px","https://github.com/ruby/net-imap/security/advisories/GHSA-75xq-5h9v-w6px","https://nvd.nist.gov/vuln/detail/CVE-2026-42258","https://github.com/ruby/net-imap/commit/aec06996eb87a7e1bbcef1f9f8926e8add2b8c71","https://github.com/ruby/net-imap/commit/9db3e9d60bfb8f3735ea95015bf8a700f4af9cbb","https://github.com/ruby/net-imap/commit/6bf02aef7e0b5931010c36e377f79a71636b306b","https://access.redhat.com/errata/RHSA-2026:33462","https://access.redhat.com/errata/RHSA-2026:37238","https://access.redhat.com/errata/RHSA-2026:37397","https://access.redhat.com/errata/RHSA-2026:38694","https://access.redhat.com/errata/RHSA-2026:40380","https://access.redhat.com/security/cve/CVE-2026-42258","https://bugzilla.redhat.com/show_bug.cgi?id=2468498","https://github.com/ruby/net-imap","https://github.com/ruby/net-imap/releases/tag/v0.4.24","https://github.com/ruby/net-imap/releases/tag/v0.5.14","https://github.com/ruby/net-imap/releases/tag/v0.6.4","https://github.com/rubysec/ruby-advisory-db/blob/master/gems/net-imap/CVE-2026-42258.yml","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42258.json","https://access.redhat.com/errata/RHSA-2026:33512","https://access.redhat.com/errata/RHSA-2026:33514","https://access.redhat.com/errata/RHSA-2026:33515","https://access.redhat.com/errata/RHSA-2026:33540","https://access.redhat.com/errata/RHSA-2026:33565","https://access.redhat.com/errata/RHSA-2026:33576","https://access.redhat.com/errata/RHSA-2026:33577","https://access.redhat.com/errata/RHSA-2026:33630","https://access.redhat.com/errata/RHSA-2026:33721","https://access.redhat.com/errata/RHSA-2026:34076","https://access.redhat.com/errata/RHSA-2026:35447","https://access.redhat.com/errata/RHSA-2026:35834","https://access.redhat.com/errata/RHSA-2026:35866","https://access.redhat.com/errata/RHSA-2026:35867","https://access.redhat.com/errata/RHSA-2026:35895","https://access.redhat.com/errata/RHSA-2026:36099","https://access.redhat.com/errata/RHSA-2026:36978"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-75xq-5h9v-w6px","url":"https://osv.dev/vulnerability/GHSA-75xq-5h9v-w6px"}],"summary":"net-imap vulnerable to command Injection via unvalidated Symbol inputs"}