RubyGems/net-imap CVE-2026-42256: medium 6.5, EPSS 0.30%

net-imap vulnerable to denial of service via high iteration count for `SCRAM-*` authentication

Action: Upgrade net-imap to 0.4.24 or later.

bundle update net-imap

Affected

Fixed versions

Sources

• osv: GHSA-87pf-fpwv-p7m7
• nvd: CVE-2026-42256
• https://github.com/ruby/net-imap/security/advisories/GHSA-87pf-fpwv-p7m7
• https://github.com/ruby/net-imap/commit/158d0b505074397cdb5ceb58935e42dd2bcfa612
• https://github.com/ruby/net-imap/commit/808001bc45c06f7297a7e96d341279e041a7f7f4
• https://github.com/ruby/net-imap/commit/99f59eab6064955a23debd95410263ad144df758
• https://github.com/ruby/net-imap
• https://github.com/ruby/net-imap/releases/tag/v0.4.24
• https://github.com/ruby/net-imap/releases/tag/v0.5.14
• https://github.com/ruby/net-imap/releases/tag/v0.6.4
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/net-imap/CVE-2026-42256.yml
• https://www.rfc-editor.org/rfc/rfc7804.html#page-15

CVE-2026-42256 · published 2026-05-04T22:03:28Z · modified 2026-09-10T03:51:04.948392726Z · JSON