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, Net::IMAP::ResponseReader has quadratic time complexity when reading large responses containing many string literals. A hostile server can send responses which are crafted to exhaust the client's CPU for a denial of service attack. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.
References
Configurations
Configuration 1 (hide)
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History
18 May 2026, 18:12
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/ruby/net-imap/commit/6091f7d6b1f3514cafbfe39c76f2b5d73de3ca96 - Patch | |
| References | () https://github.com/ruby/net-imap/commit/88d95231fc8afef11c1f074453f7d75b68c9dfda - Patch | |
| References | () https://github.com/ruby/net-imap/commit/de685f91a4a4cc75eb80da898c2bf8af08d34819 - Patch | |
| References | () https://github.com/ruby/net-imap/releases/tag/v0.4.24 - Release Notes | |
| References | () https://github.com/ruby/net-imap/releases/tag/v0.5.14 - Release Notes | |
| References | () https://github.com/ruby/net-imap/releases/tag/v0.6.4 - Release Notes | |
| References | () https://github.com/ruby/net-imap/security/advisories/GHSA-q2mw-fvj9-vvcw - Mitigation, Vendor Advisory | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
| First Time |
Ruby-lang net\
Ruby-lang |
|
| CPE | cpe:2.3:a:ruby-lang:net\:\:imap:*:*:*:*:*:ruby:*:* |
09 May 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-09 20:16
Updated : 2026-05-18 18:12
NVD link : CVE-2026-42245
Mitre link : CVE-2026-42245
CVE.ORG link : CVE-2026-42245
JSON object : View
Products Affected
ruby-lang
- net\
CWE
CWE-407
Inefficient Algorithmic Complexity