ELSA-2026-50778: Security update for 24 packages

ELSA-2026-50778, released August 14, 2026, fixes 6 CVEs across 24 products. None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

9.8

Base score, 0 to 10

Highest EPSS

0.0083

57th percentile

Priority of the 6 CVEs

Patch now 0
                                Urgent 0
                                High 6
                                Routine 0

Fixed package versions

Product	Release	Fixed in
ruby	ol 10	0:3.3.12-14.el10_2
ruby-bundled-gems	ol 10	0:3.3.12-14.el10_2
ruby-default-gems	ol 10	0:3.3.12-14.el10_2
ruby-devel	ol 10	0:3.3.12-14.el10_2
ruby-doc	ol 10	0:3.3.12-14.el10_2
ruby-libs	ol 10	0:3.3.12-14.el10_2
rubygem-bigdecimal	ol 10	0:3.1.5-14.el10_2
rubygem-bundler	ol 10	0:2.5.22-14.el10_2
rubygem-io-console	ol 10	0:0.7.1-14.el10_2
rubygem-irb	ol 10	0:1.13.1-14.el10_2
rubygem-json	ol 10	0:2.7.2-14.el10_2
rubygem-minitest	ol 10	0:5.20.0-14.el10_2
rubygem-power_assert	ol 10	0:2.0.3-14.el10_2
rubygem-psych	ol 10	0:5.1.2-14.el10_2
rubygem-racc	ol 10	0:1.7.3-14.el10_2
rubygem-rake	ol 10	0:13.1.0-14.el10_2
rubygem-rbs	ol 10	0:3.4.0-14.el10_2
rubygem-rdoc	ol 10	0:6.6.3.1-14.el10_2
rubygem-rexml	ol 10	0:3.4.4-14.el10_2
rubygem-rss	ol 10	0:0.3.1-14.el10_2
rubygem-test-unit	ol 10	0:3.6.1-14.el10_2
rubygem-typeprof	ol 10	0:0.21.9-14.el10_2
rubygems	ol 10	0:3.5.22-14.el10_2
rubygems-devel	ol 10	0:3.5.22-14.el10_2

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-47240	Net::IMAP: Command Injection via non-synchronizing literal in "raw" argument	7.3	0.0083	None reported
High	CVE-2026-27820	zlib: Buffer Overflow in Zlib::GzipReader ungetc via large input leads to memory corruption	9.8	0.0056	None reported
High	CVE-2026-42257	net-imap: Command Injection via "raw" arguments to multiple commands	9.8	0.0043	None reported
High	CVE-2026-47241	Net::IMAP: Denial of Service via incomplete raw argument validation	7.3	0.0038	None reported
High	CVE-2026-42256	net-imap: Denial of service via high iteration count for `SCRAM-*` authentication	7.3	0.0030	None reported
High	CVE-2026-47242	ruby: Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby	7.3	0.0018	None reported

Also fixes CVE-2026-47240

OPENSUSE-SU-2026:21878-1
ruby3.4 on opensuse-leap 16.0
RHSA-2026:50828
ruby, ruby-bundled-gems, ruby-default-gems and 25 more on RHEL 9
RHSA-2026:50728
ruby, ruby-bundled-gems, ruby-default-gems and 27 more on RHEL 8
RLSA-2026:50773
ruby4.0 on rocky 10
RLSA-2026:50778
ruby on rocky 10
RLSA-2026:50828
ruby, rubygem-mysql2, rubygem-pg on rocky 9
RLSA-2026:50728
ruby, rubygem-abrt, rubygem-mysql2 and 1 more on rocky 8
ELSA-2026-50773
ruby4.0, ruby4.0-devel, ruby4.0-doc and 2 more on ol 10

Vendor advisory

https://linux.oracle.com/errata/ELSA-2026-50778.html

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