CVEvulnerability

CVE-2026-42246

7.6 HIGH Published 2026-05-09 Modified 2026-08-24 Official page ↗
Status
Modified
Published
2026-05-09
Last modified
2026-08-24
Assigner
[email protected]
CVSS 4.0 ([email protected])
7.6 HIGH — CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/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
CVSS 3.1 ([email protected])
7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-325, CWE-392, CWE-393, CWE-636, CWE-754, CWE-841

Description

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4.

Affected configurations

• ruby-lang net\ \ (< 0.3.10) • ruby-lang net\ \ (>= 0.4.0 < 0.4.24) • ruby-lang net\ \ (>= 0.5.0 < 0.5.14) • ruby-lang net\ \ (>= 0.6.0 < 0.6.4)

Related

Weakness · CWE (6)

  • CWE-325 Missing Cryptographic Step weakness
  • CWE-392 Missing Report of Error Condition weakness
  • CWE-393 Return of Wrong Status Code weakness
  • CWE-636 Not Failing Securely weakness
  • CWE-754 Improper Check for Unusual or Exceptional Conditions weakness
  • CWE-841 Improper Enforcement of Behavioral Workflow weakness

References