CVEvulnerability

CVE-2026-42256

6.0 MEDIUM Published 2026-05-09 Modified 2026-07-24 Official page ↗
Status
Analyzed
Published
2026-05-09
Last modified
2026-07-24
Assigner
[email protected]
CVSS 4.0 ([email protected])
6.0 MEDIUM — CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/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])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weaknesses
CWE-1322, CWE-770

Description

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. From versions 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

Affected configurations

• 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 (2)

  • CWE-1322 Use of Blocking Code in Single-threaded, Non-blocking Context weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References