Most recent entries from all

ALSA-2026:50728 — Important: ruby:3.3 security, bug fix, and enhancement update

Affected: AlmaLinux:8: ruby, AlmaLinux:8: ruby-bundled-gems, AlmaLinux:8: ruby-default-gems, AlmaLinux:8: ruby-devel, AlmaLinux:8: ruby-doc, AlmaLinux:8: ruby-libs, AlmaLinux:8: rubygem-abrt, AlmaLinux:8: rubygem-abrt-doc, AlmaLinux:8: rubygem-bigdecimal, AlmaLinux:8: rubygem-bundler and 20 more

Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks.

Security Fix(es):

* zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820) * net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input (CVE-2026-42257) * ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication (CVE-2026-42256) * net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240) * net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation (CVE-2026-47242) * net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)

Bug Fix(es) and Enhancement(s):

* ruby:3.3/ruby: Rebase to the latest Ruby 3.3 release [almalinux-8] (JIRA:AlmaLinux-170929)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2026-15061

BELL-CVE-2026-42257

Affected: Alpaquita:25: ruby-net-imap, Alpaquita:stream: ruby-net-imap

BREW-imap-backup-CVE-2026-42257 — net-imap vulnerable to command Injection via "raw" arguments to multiple commands

Affected: Homebrew: imap-backup

### Summary Several `Net::IMAP` commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain `CRLF` sequences, which an attacker can use to inject arbitrary IMAP commands.

### Details

`Net::IMAP`'s generic argument handling, used by most command arguments, interprets string arguments as an IMAP `astring`. Depending on the string contents and the connection's UTF-8 support, this encodes strings as either a `atom`, `quoted`, or `literal`. These are safe from command or argument injection.

But the following commands transform specific String arguments to `Net::IMAP::RawData`, which bypasses normal argument validation and encoding and prints the string directly to the socket: * `#uid_search`, `#search`, `#uid_sort`, `#sort`, `#uid_thread`, `#thread` * when `criteria` is a String, it is sent raw * `#uid_fetch`, `#fetch * when `attr` is a String, it is sent raw * when `attr` is an Array, each String in `attr` is sent raw * `#uid_store`, `#store` * when `attr` is a String, it is sent raw * `#setquota`: * `limit` is interpolated with `#to_s` and that string is sent raw

Because these string arguments are sent without any neutralization, they serve as a direct vector for command splitting. Any user controlled data interpolated into these strings can be used to break out of the intended command context.

Using \"raw data\" arguments for `#uid_store`, `#sto…

certfr-2026-avi-0958 — De multiples vulnérabilités ont été découvertes dans les produits IBM. Certaines d'entre elles permettent à un attaquan…

certfr-2026-avi-0958

CLEANSTART-2026-NN77724 — Security fix for CVE-2026-42257 applied in: ruby-fluentd-1.19 1.19.2-r2

Affected: CleanStart: ruby-fluentd-1.19

Security vulnerability affects the ruby-fluentd-1.19 package. This issue is resolved in later releases. See references for vulnerability details.

EUVD-2026-318200

fkie_cve-2026-42257

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, several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

GHSA-hm49-wcqc-g2xg — net-imap vulnerable to command Injection via "raw" arguments to multiple commands

Affected: RubyGems: net-imap

### Details

Using \"raw data\" arguments for `#uid_store`, `#sto…

msrc_CVE-2026-42257 — net-imap: Command Injection via "raw" arguments to multiple commands

msrc_CVE-2026-42257

OESA-2026-2578 — ruby security update

Affected: openEuler:20.03-LTS-SP4: ruby, openEuler:22.03-LTS-SP4: ruby, openEuler:24.03-LTS-SP1: ruby, openEuler:24.03-LTS-SP3: ruby

Ruby is a fast and easy interpreted scripting language for object-oriented programming. It has many functions for processing text Files and perform system management tasks (such as Perl). Security Fix(es):

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, Net::IMAP::ResponseReader has quadratic time complexity when reading large responses containing many string literals. A hostile server can send responses which are crafted to exhaust the client's CPU for a denial of service attack. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.(CVE-2026-42245)

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.(CVE-2026-42246)

RHSA-2026:36978 — Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments

RHSA-2026:50728 — Red Hat Security Advisory: ruby:3.3 security, bug fix, and enhancement update

zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input net-imap: Net::IMAP: Command injection via non-synchronizing literals net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation

RLSA-2026:50728 — Important: ruby:3.3 security, bug fix, and enhancement update

Affected: Rocky Linux:8: ruby, Rocky Linux:8: rubygem-abrt, Rocky Linux:8: rubygem-mysql2, Rocky Linux:8: rubygem-pg

Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks.

Security Fix(es):

* zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)

* net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input (CVE-2026-42257)

* ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication (CVE-2026-42256)

* net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)

* net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation (CVE-2026-47242)

* net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)

Bug Fix(es) and Enhancement(s):

* ruby:3.3/ruby: Rebase to the latest Ruby 3.3 release [rhel-8] (JIRA:Rocky Linux-170929)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

UBUNTU-CVE-2026-42257

Affected: Ubuntu:Pro:14.04:LTS: jruby, Ubuntu:Pro:16.04:LTS: ruby2.3, Ubuntu:16.04:LTS: jruby, Ubuntu:Pro:18.04:LTS: ruby2.5, Ubuntu:18.04:LTS: jruby, Ubuntu:Pro:20.04:LTS: ruby2.7, Ubuntu:20.04:LTS: jruby, Ubuntu:22.04:LTS: ruby3.0, Ubuntu:24.04:LTS: jruby, Ubuntu:24.04:LTS: ruby3.2 and 4 more

WID-SEC-W-2026-2117 — HCL BigFix Compliance (Ruby): Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in HCL BigFix Compliance ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand herbeizuführen.