Back to overview

CVE-2026-47242

MEDIUM
5.8
CVSS 4.0
Description
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, when Net::IMAP#id is called with a hash argument, although the ID field value strings are correctly quoted (escaping quoted specials), they were not validated to prohibit CRLF sequences. While Net::IMAP#enable does process its arguments for aliases, it does not validate them as valid atoms (or as a list of valid atoms). The #to_s value is sent verbatim. Arguments to either command could be used by an attacker to inject arbitrary IMAP commands. This vulnerability is fixed in 0.6.5 and 0.5.15.

Metadata

CVE ID
CVE-2026-47242
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-18 22:54 UTC
Published
2026-06-22 20:19 UTC
Last updated
2026-06-22 20:19 UTC
Primary CWE
CWE-77
CWE-77: Improper Neutralization of Special Elements used in …
Vendor / Product
ruby / net-imap
Sources
cve.org  ·  NVD

Severity & Metrics

5.8 MEDIUM CVSS 4.0
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Affected products (1)
VendorProductPlatformVersions
ruby net-imap — >= 0.6.0, < 0.6.4.1, < 0.5.15
Weakness (CWE)
CWESourceDescription
CWE-77 cna CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-93 cna CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.8 MEDIUM 4.0 cna CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
References (1)
Back to overview