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CVE-2026-42258

Low

No strong exploitation signal.

CVSS base
5.3 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
EPSS — probability of exploitation (30 days)
1.3%
68.2th percentile
CISA KEV
Not listed
Weakness / dates
CWE-93
Published 2026-05-09 · modified 2026-08-24

CVSS breakdown

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L

Attack VectorLLocal
Attack ComplexityHHigh
Privileges RequiredLLow
User InteractionNNone
ScopeUUnchanged
ConfidentialityNNone
IntegrityHHigh
AvailabilityLLow

Timeline

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.

Affected

ruby-lang

References

Official: NVD · CVE.org