MEDIUM SeverityCVSS 4.05.8CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
CVE-2026-42258
Last updated May 09, 2026 · Published May 09, 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.
Affected products
1 listed- ruby:net-imap
Mappings
CWE
CWE-77CWE-93
CAPEC
None listed.
Related
Training
- Injection TodaySQL, NoSQL, ORM, and LLM injection - what's changed and what hasn't.
- Input Validation and Schema EnforcementValidate early, validate strictly - schemas, allowlists, and type-safe boundaries.
- Secure Defaults in Modern FrameworksHow Rails, Next.js, Django, and Spring protect you - and where they don't.
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