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NVD Vulnerability Details :
CVE-2026-42258
Modified
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-09 May, 2026 | 20:16
Updated At-01 Jul, 2026 | 13:17

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.

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
Secondary4.05.8MEDIUM
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/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
Primary3.15.3MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Secondary3.17.1HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N
N/A
Type: Secondary
Version: 4.0
Base score: 5.8
Base severity: MEDIUM
Vector:
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/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: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Type: Secondary
Version: 3.1
Base score: 7.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
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-77Secondarysecurity-advisories@github.com
CWE-93Secondarysecurity-advisories@github.com
CWE-93Secondary0b0ca135-0b70-47e7-9f44-1890c2a1c46c
CWE ID: CWE-77
Type: Secondary
Source: security-advisories@github.com
CWE ID: CWE-93
Type: Secondary
Source: security-advisories@github.com
CWE ID: CWE-93
Type: Secondary
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
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-75xq-5h9v-w6pxsecurity-advisories@github.com
Mitigation
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:334620b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:335120b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:335140b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:335150b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:335400b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:335650b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:335760b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:335770b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:336300b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/security/cve/CVE-2026-422580b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://bugzilla.redhat.com/show_bug.cgi?id=24684980b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42258.json0b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
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-75xq-5h9v-w6px
Source: security-advisories@github.com
Resource:
Mitigation
Vendor Advisory
Hyperlink: https://access.redhat.com/errata/RHSA-2026:33462
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:33512
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:33514
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:33515
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:33540
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:33565
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:33576
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:33577
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:33630
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/security/cve/CVE-2026-42258
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2468498
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42258.json
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Change History
0Changes found
Details not found