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.

Attack Vector Local

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
ruby net-imap affected
Version Status Constraints
< 0.4.24 affected —
>= 0.5.0, < 0.5.14 affected —
>= 0.6.0, < 0.6.4 affected —

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Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-75xq-5h9v-w6px net-imap vulnerable to command Injection via unvalidated Symbol inputs
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/ruby/net-imap/releases/tag/v0.4.24 cve-icon cve-icon
https://github.com/ruby/net-imap/releases/tag/v0.5.14 cve-icon cve-icon
https://github.com/ruby/net-imap/releases/tag/v0.6.4 cve-icon cve-icon
https://github.com/ruby/net-imap/security/advisories/GHSA-75xq-5h9v-w6px cve-icon cve-icon
History

Sat, 09 May 2026 20:00:00 +0000

Type Values Removed Values Added
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.
Title net-imap: Command Injection via unvalidated Symbol inputs
Weaknesses CWE-77
CWE-93
References
Metrics cvssV4_0

{'score': 5.8, '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-09T19:40:49.405Z

Reserved: 2026-04-26T11:53:27.704Z

Link: CVE-2026-42258

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-09T20:16:28.623

Modified: 2026-05-09T20:16:28.623

Link: CVE-2026-42258

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-09T21:30:42Z

Weaknesses