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NVD Vulnerability Details :
CVE-2026-42245
Analyzed
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-09 May, 2026 | 20:16
Updated At-18 May, 2026 | 18:12

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.02.3LOW
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Secondary
Version: 4.0
Base score: 2.3
Base severity: LOW
Vector:
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Primary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CPE Matches
Ruby
ruby-lang
>>net\>>\
cpe:2.3:a:ruby-lang:net\:\:imap:*:*:*:*:*:ruby:*:*
Ruby
ruby-lang
>>net\>>\
cpe:2.3:a:ruby-lang:net\:\:imap:*:*:*:*:*:ruby:*:*
Ruby
ruby-lang
>>net\>>\
cpe:2.3:a:ruby-lang:net\:\:imap:*:*:*:*:*:ruby:*:*
Weaknesses
CWE IDTypeSource
CWE-407Primarysecurity-advisories@github.com
CWE ID: CWE-407
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/ruby/net-imap/commit/6091f7d6b1f3514cafbfe39c76f2b5d73de3ca96security-advisories@github.com
Patch
https://github.com/ruby/net-imap/commit/88d95231fc8afef11c1f074453f7d75b68c9dfdasecurity-advisories@github.com
Patch
https://github.com/ruby/net-imap/commit/de685f91a4a4cc75eb80da898c2bf8af08d34819security-advisories@github.com
Patch
https://github.com/ruby/net-imap/releases/tag/v0.4.24security-advisories@github.com
Release Notes
https://github.com/ruby/net-imap/releases/tag/v0.5.14security-advisories@github.com
Release Notes
https://github.com/ruby/net-imap/releases/tag/v0.6.4security-advisories@github.com
Release Notes
https://github.com/ruby/net-imap/security/advisories/GHSA-q2mw-fvj9-vvcwsecurity-advisories@github.com
Mitigation
Vendor Advisory
Hyperlink: https://github.com/ruby/net-imap/commit/6091f7d6b1f3514cafbfe39c76f2b5d73de3ca96
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/ruby/net-imap/commit/88d95231fc8afef11c1f074453f7d75b68c9dfda
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/ruby/net-imap/commit/de685f91a4a4cc75eb80da898c2bf8af08d34819
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/ruby/net-imap/releases/tag/v0.4.24
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/ruby/net-imap/releases/tag/v0.5.14
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/ruby/net-imap/releases/tag/v0.6.4
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/ruby/net-imap/security/advisories/GHSA-q2mw-fvj9-vvcw
Source: security-advisories@github.com
Resource:
Mitigation
Vendor Advisory
Change History
0Changes found
Details not found