CVE-2026-42258
net-imap: Command Injection via unvalidated Symbol inputs
- State
- Published
- Severity
- 5.8 Medium
- Published
- May 9, 2026
- Updated
- Sep 1, 2026
- Reserved
- Apr 26, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.8 Medium | CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N | GitHub_M |
| 3.1 | 7.1 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N | redhat-SADP |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
net-imapruby |
|
References
- https://github.com/ruby/net-imap/security/advisories/GHSA-75xq-5h9v-w6px
- 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://access.redhat.com/security/cve/CVE-2026-42258vdb-entry
- RHBZ#2468498issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42258.json
- https://access.redhat.com/errata/RHSA-2026:37397vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:35895vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33565vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33540vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33514vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33515vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:35866vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:35867vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:34076vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:35834vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33630vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:36099vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33462vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:37238vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33512vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33576vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33577vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:40380vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:38694vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:36978vendor-advisory
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