ruby security update

3.3.10-13 - Fix DoS via crafted IMAP responses in net-imap. CVE-2026-42245 Resolves: RHEL-181687 - Fix information disclosure via MITM attack bypassing TLS in net-imap. CVE-2026-42246 Resolves: RHEL-181775 - Fix command injection via Symbol arguments in net-imap. CVE-2026-42258 Resolves: RHEL-181...

PT-2026-60480

Name of the Vulnerable Software and Affected Versions Kiota versions prior to 1.32.0 Description The Ruby generator in Kiota fails to properly escape the character when embedding OpenAPI default fields, property names, and other schema-derived strings into Ruby double-quoted literals. This occurs...

ruby4.0 security update

4.0.3-35 - Fix Net::IMAP ResponseReader quadratic complexity vulnerability CVE-2026-42245 Includes core fix plus additional performance optimizations Resolves: RHEL-181675 - Fix Net::IMAP STARTTLS stripping vulnerability CVE-2026-42246 Resolves: RHEL-181767 - Fix Net::IMAP command injection...

Important: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

An update for Red Hat Hardened Images RPMs is now available. This update includes the following RPMs: ruby3.3: ruby3.3-3.3.10-23.4.hum1 aarch64, x8664 ruby3.3-bundled-gems-3.3.10-23.4.hum1 aarch64, x8664 ruby3.3-default-gems-3.3.10-23.4.hum1 noarch ruby3.3-devel-3.3.10-23.4.hum1 aarch64, x8664...

ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments

A flaw was found in Net::IMAP, a Ruby library that provides Internet Message Access Protocol IMAP client functionality. This vulnerability allows a remote attacker to inject arbitrary IMAP commands. This is achieved by passing specially crafted symbol arguments to IMAP commands. Successful...

Fedora 45 : ruby (2026-7f499e0362)

The remote Fedora 45 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-7f499e0362 advisory. Ruby 4.0.6 is released. Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not...

CVE-2026-45363

ruby-jwt is a Ruby implementation of the RFC 7519 OAuth JSON Web Token standard. Prior to 2.10.3 and 3.2.0, JWT.decodetoken, '', true, algorithm: 'HS256' accepts an attacker-forged token because OpenSSL::HMAC.digest'SHA256', '', payload returns a valid digest under an empty key and no empty-key...

UBUNTU-CVE-2026-45363

ruby-jwt is a Ruby implementation of the RFC 7519 OAuth JSON Web Token standard. Prior to 2.10.3 and 3.2.0, JWT.decodetoken, '', true, algorithm: 'HS256' accepts an attacker-forged token because OpenSSL::HMAC.digest'SHA256', '', payload returns a valid digest under an empty key and no empty-key...

CVE-2026-45363

ruby-jwt is a Ruby implementation of the RFC 7519 OAuth JSON Web Token standard. Prior to 2.10.3 and 3.2.0, JWT.decodetoken, '', true, algorithm: 'HS256' accepts an attacker-forged token because OpenSSL::HMAC.digest'SHA256', '', payload returns a valid digest under an empty key and no empty-key...

CVE-2026-45363

CVE-2026-45363 affects the ruby-jwt gem (Ruby implementation of JWT). Prior to versions 2.10.3 and 3.2.0, JWT.decode(token, '', true, algorithm: 'HS256') can accept attacker-forged tokens because OpenSSL::HMAC.digest('SHA256', '', payload) yields a valid digest with an empty key, and empty-key pa...

CVE-2026-45363

ruby-jwt is a Ruby implementation of the RFC 7519 OAuth JSON Web Token standard. Prior to 2.10.3 and 3.2.0, JWT.decodetoken, '', true, algorithm: 'HS256' accepts an attacker-forged token because OpenSSL::HMAC.digest'SHA256', '', payload returns a valid digest under an empty key and no empty-key...

CVE-2026-45363 `jwt` (Ruby gem) - empty-key HMAC bypass

ruby-jwt is a Ruby implementation of the RFC 7519 OAuth JSON Web Token standard. Prior to 2.10.3 and 3.2.0, JWT.decodetoken, '', true, algorithm: 'HS256' accepts an attacker-forged token because OpenSSL::HMAC.digest'SHA256', '', payload returns a valid digest under an empty key and no empty-key...

ruby: net-imap: Net::IMAP: Denial of Service via crafted IMAP responses

A flaw was found in Net::IMAP, a Ruby library implementing the Internet Message Access Protocol IMAP client functionality. A hostile server can exploit a quadratic time complexity issue in the Net::IMAP::ResponseReader when processing large responses containing numerous string literals. This can...

Important: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

An update for Red Hat Hardened Images RPMs is now available. This update includes the following RPMs: ruby3.4: ruby3.4-3.4.10-31.hum1 aarch64, x8664 ruby3.4-bundled-gems-3.4.10-31.hum1 aarch64, x8664 ruby3.4-default-gems-3.4.10-31.hum1 noarch ruby3.4-devel-3.4.10-31.hum1 aarch64, x8664...

ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments

A flaw was found in Net::IMAP, a Ruby library that provides Internet Message Access Protocol IMAP client functionality. This vulnerability allows a remote attacker to inject arbitrary IMAP commands. This is achieved by passing specially crafted symbol arguments to IMAP commands. Successful...

net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS

A flaw was found in the Ruby net-imap library. When upgrading a cleartext IMAP connection to TLS using the Net::IMAPstarttls method, the library improperly handles certain responses received during STARTTLS negotiation. A man-in-the-middle MITM attacker can inject a predicted tagged OK response...

MiracleLinux 8 : ruby:2.5 (AXSA:2026-1244:01)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1244:01 advisory. ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments CVE-2026-42258 net-imap: ruby: Net::IMAP: Information disclosure via...

RHSA-2026:37397 Red Hat Security Advisory: ruby security update

Bulletin has no description...

RHSA-2026:37238 Red Hat Security Advisory: ruby:3.3 security update

Bulletin has no description...

MiracleLinux 8 : ruby:3.3 (AXSA:2026-1246:01)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1246:01 advisory. ruby: net-imap: Net::IMAP: Denial of Service via crafted IMAP responses CVE-2026-42245 ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via...