| Name | CVE-2026-42257 |
| 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, several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1136823 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| ruby2.7 (PTS) | bullseye | 2.7.4-1+deb11u1 | vulnerable |
| bullseye (security) | 2.7.4-1+deb11u5 | vulnerable | |
| ruby3.1 (PTS) | bookworm, bookworm (security) | 3.1.2-7+deb12u1 | vulnerable |
| ruby3.3 (PTS) | trixie | 3.3.8-2 | vulnerable |
| forky, sid | 3.3.8-2.2 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| ruby2.7 | source | (unstable) | (unfixed) | |||
| ruby3.1 | source | (unstable) | (unfixed) | |||
| ruby3.3 | source | (unstable) | (unfixed) | 1136823 |
https://github.com/ruby/net-imap/security/advisories/GHSA-hm49-wcqc-g2xg
Net::IMAP embedded in src:ruby* source package