HighFix available
Red Hat Security Advisory: ruby:4.0 security, bug fix, and enhancement update
Type: advisorySources: OSV
- Products
- ruby, ruby-bundled-gems, ruby-bundled-gems-debuginfo, ruby-debuginfo, ruby-debugsource, ruby-default-gems, ruby-devel, ruby-doc, ruby-libs, ruby-libs-debuginfo, rubygem-bigdecimal, rubygem-bigdecimal-debuginfo, rubygem-bundler, rubygem-io-console, rubygem-io-console-debuginfo, rubygem-irb, rubygem-json, rubygem-json-debuginfo, rubygem-minitest, rubygem-mysql2, rubygem-mysql2-debuginfo, rubygem-mysql2-debugsource, rubygem-mysql2-doc, rubygem-pg, rubygem-pg-debuginfo, rubygem-pg-debugsource, rubygem-pg-doc, rubygem-power_assert, rubygem-psych, rubygem-psych-debuginfo, rubygem-racc, rubygem-racc-debuginfo, rubygem-rake, rubygem-rbs, rubygem-rbs-debuginfo, rubygem-rdoc, rubygem-rexml, rubygem-rss, rubygem-test-unit, rubygem-typeprof, rubygems, rubygems-devel
- Affected versions
- Not specified
- Fixed versions
- 0:0.3.2-34.module+el9.8.0+24564+e55418dc, 0:0.31.1-34.module+el9.8.0+24564+e55418dc, 0:0.5.7-1.module+el9.8.0+24428+77f1d00a, 0:0.8.2-34.module+el9.8.0+24564+e55418dc, 0:1.16.0-34.module+el9.8.0+24564+e55418dc, 0:1.6.3-1.module+el9.8.0+24428+77f1d00a, 0:1.8.1-34.module+el9.8.0+24564+e55418dc, 0:13.3.1-34.module+el9.8.0+24564+e55418dc, 0:2.18.0-34.module+el9.8.0+24564+e55418dc, 0:3.0.1-34.module+el9.8.0+24564+e55418dc, 0:3.10.0-34.module+el9.8.0+24564+e55418dc, 0:3.4.4-34.module+el9.8.0+24564+e55418dc, 0:3.7.5-34.module+el9.8.0+24564+e55418dc, 0:4.0.1-34.module+el9.8.0+24564+e55418dc, 0:4.0.16-34.module+el9.8.0+24564+e55418dc, 0:4.0.6-34.module+el9.8.0+24564+e55418dc, 0:5.3.1-34.module+el9.8.0+24564+e55418dc, 0:6.0.0-34.module+el9.8.0+24564+e55418dc, 0:7.0.4-34.module+el9.8.0+24564+e55418dc
- CVEs
- CVE-2026-27820, CVE-2026-42256, CVE-2026-42257, CVE-2026-47240, CVE-2026-47241, CVE-2026-47242
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:14 UTC · Revision 1
Source evidence
Red Hat Security Advisory: ruby:4.0 security, bug fix, and enhancement update
core-osv · Original sourcePublished 27 Aug 2026, 10:14 UTC
Red Hat Security Advisory: ruby:4.0 security, bug fix, and enhancement update
osv:RHSA-2026:50827
ruby
Fixed versions: 0:4.0.6-34.module+el9.8.0+24564+e55418dc
ruby-bundled-gems
Fixed versions: 0:4.0.6-34.module+el9.8.0+24564+e55418dc
ruby-bundled-gems-debuginfo
Fixed versions: 0:4.0.6-34.module+el9.8.0+24564+e55418dc
ruby-debuginfo
Fixed versions: 0:4.0.6-34.module+el9.8.0+24564+e55418dc
ruby-debugsource
Fixed versions: 0:4.0.6-34.module+el9.8.0+24564+e55418dc
ruby-default-gems
Fixed versions: 0:4.0.6-34.module+el9.8.0+24564+e55418dc
ruby-devel
Fixed versions: 0:4.0.6-34.module+el9.8.0+24564+e55418dc
ruby-doc
Fixed versions: 0:4.0.6-34.module+el9.8.0+24564+e55418dc
ruby-libs
Fixed versions: 0:4.0.6-34.module+el9.8.0+24564+e55418dc
ruby-libs-debuginfo
Fixed versions: 0:4.0.6-34.module+el9.8.0+24564+e55418dc
rubygem-bigdecimal
Fixed versions: 0:4.0.1-34.module+el9.8.0+24564+e55418dc
rubygem-bigdecimal-debuginfo
Fixed versions: 0:4.0.1-34.module+el9.8.0+24564+e55418dc
rubygem-bundler
Fixed versions: 0:4.0.16-34.module+el9.8.0+24564+e55418dc
rubygem-io-console
Fixed versions: 0:0.8.2-34.module+el9.8.0+24564+e55418dc
rubygem-io-console-debuginfo
Fixed versions: 0:0.8.2-34.module+el9.8.0+24564+e55418dc
rubygem-irb
Fixed versions: 0:1.16.0-34.module+el9.8.0+24564+e55418dc
rubygem-json
Fixed versions: 0:2.18.0-34.module+el9.8.0+24564+e55418dc
rubygem-json-debuginfo
Fixed versions: 0:2.18.0-34.module+el9.8.0+24564+e55418dc
rubygem-minitest
Fixed versions: 0:6.0.0-34.module+el9.8.0+24564+e55418dc
rubygem-mysql2
Fixed versions: 0:0.5.7-1.module+el9.8.0+24428+77f1d00a
rubygem-mysql2-debuginfo
Fixed versions: 0:0.5.7-1.module+el9.8.0+24428+77f1d00a
rubygem-mysql2-debugsource
Fixed versions: 0:0.5.7-1.module+el9.8.0+24428+77f1d00a
rubygem-mysql2-doc
Fixed versions: 0:0.5.7-1.module+el9.8.0+24428+77f1d00a
rubygem-pg
Fixed versions: 0:1.6.3-1.module+el9.8.0+24428+77f1d00a
rubygem-pg-debuginfo
Fixed versions: 0:1.6.3-1.module+el9.8.0+24428+77f1d00a
rubygem-pg-debugsource
Fixed versions: 0:1.6.3-1.module+el9.8.0+24428+77f1d00a
rubygem-pg-doc
Fixed versions: 0:1.6.3-1.module+el9.8.0+24428+77f1d00a
rubygem-power_assert
Fixed versions: 0:3.0.1-34.module+el9.8.0+24564+e55418dc
rubygem-psych
Fixed versions: 0:5.3.1-34.module+el9.8.0+24564+e55418dc
rubygem-psych-debuginfo
Fixed versions: 0:5.3.1-34.module+el9.8.0+24564+e55418dc
rubygem-racc
Fixed versions: 0:1.8.1-34.module+el9.8.0+24564+e55418dc
rubygem-racc-debuginfo
Fixed versions: 0:1.8.1-34.module+el9.8.0+24564+e55418dc
rubygem-rake
Fixed versions: 0:13.3.1-34.module+el9.8.0+24564+e55418dc
rubygem-rbs
Fixed versions: 0:3.10.0-34.module+el9.8.0+24564+e55418dc
rubygem-rbs-debuginfo
Fixed versions: 0:3.10.0-34.module+el9.8.0+24564+e55418dc
rubygem-rdoc
Fixed versions: 0:7.0.4-34.module+el9.8.0+24564+e55418dc
rubygem-rexml
Fixed versions: 0:3.4.4-34.module+el9.8.0+24564+e55418dc
rubygem-rss
Fixed versions: 0:0.3.2-34.module+el9.8.0+24564+e55418dc
rubygem-test-unit
Fixed versions: 0:3.7.5-34.module+el9.8.0+24564+e55418dc
rubygem-typeprof
Fixed versions: 0:0.31.1-34.module+el9.8.0+24564+e55418dc
rubygems
Fixed versions: 0:4.0.16-34.module+el9.8.0+24564+e55418dc
rubygems-devel
Fixed versions: 0:4.0.16-34.module+el9.8.0+24564+e55418dc
Complete source record
{
"id": "e74064d23ab1a08e729f379cfdeec016b0f353c1c5141ba8f7e0681b804dc294",
"url": "https://osv.dev/vulnerability/RHSA-2026%3A50827",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Red Hat Security Advisory: ruby:4.0 security, bug fix, and enhancement update",
"summary": "Red Hat Security Advisory: ruby:4.0 security, bug fix, and enhancement update",
"evidence": "osv:RHSA-2026:50827",
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{
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"evidence": "/affected/4/ranges"
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},
{
"name": {
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"evidence": "/affected/5/package/name"
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{
"name": {
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"evidence": "/affected/6/package/name"
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{
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"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby-doc",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.0.6-34.module+el9.8.0+24564+e55418dc",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby-libs",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby-libs-debuginfo",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.0.6-34.module+el9.8.0+24564+e55418dc",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rubygem-bigdecimal",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.0.1-34.module+el9.8.0+24564+e55418dc",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rubygem-bigdecimal-debuginfo",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.0.1-34.module+el9.8.0+24564+e55418dc",
"evidence": "/affected/11/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rubygem-bundler",
"evidence": "/affected/12/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/12/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rubygem-io-console",
"evidence": "/affected/13/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:0.8.2-34.module+el9.8.0+24564+e55418dc",
"evidence": "/affected/13/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rubygem-io-console-debuginfo",
"evidence": "/affected/14/package/name"
},
"prerequisites": [],
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{
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"evidence": "/affected/14/ranges"
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],
"affected_versions": []
},
{
"name": {
"value": "rubygem-irb",
"evidence": "/affected/15/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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],
"affected_versions": []
},
{
"name": {
"value": "rubygem-json",
"evidence": "/affected/16/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:2.18.0-34.module+el9.8.0+24564+e55418dc",
"evidence": "/affected/16/ranges"
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],
"affected_versions": []
},
{
"name": {
"value": "rubygem-json-debuginfo",
"evidence": "/affected/17/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:2.18.0-34.module+el9.8.0+24564+e55418dc",
"evidence": "/affected/17/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rubygem-minitest",
"evidence": "/affected/18/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/18/ranges"
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],
"affected_versions": []
},
{
"name": {
"value": "rubygem-mysql2",
"evidence": "/affected/19/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"affected_versions": []
},
{
"name": {
"value": "rubygem-mysql2-debuginfo",
"evidence": "/affected/20/package/name"
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{
"name": {
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{
"name": {
"value": "rubygem-mysql2-doc",
"evidence": "/affected/22/package/name"
},
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{
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"evidence": "/affected/22/ranges"
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],
"affected_versions": []
},
{
"name": {
"value": "rubygem-pg",
"evidence": "/affected/23/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/23/ranges"
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],
"affected_versions": []
},
{
"name": {
"value": "rubygem-pg-debuginfo",
"evidence": "/affected/24/package/name"
},
"prerequisites": [],
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{
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],
"affected_versions": []
},
{
"name": {
"value": "rubygem-pg-debugsource",
"evidence": "/affected/25/package/name"
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"fixed_versions": [
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],
"affected_versions": []
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{
"name": {
"value": "rubygem-pg-doc",
"evidence": "/affected/26/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/26/ranges"
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],
"affected_versions": []
},
{
"name": {
"value": "rubygem-power_assert",
"evidence": "/affected/27/package/name"
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"affected_versions": []
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{
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{
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{
"name": {
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"evidence": "/affected/30/package/name"
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{
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{
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{
"name": {
"value": "rubygem-rake",
"evidence": "/affected/32/package/name"
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"prerequisites": [],
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{
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"evidence": "/affected/32/ranges"
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{
"name": {
"value": "rubygem-rbs",
"evidence": "/affected/33/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"affected_versions": []
},
{
"name": {
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{
"name": {
"value": "rubygem-rdoc",
"evidence": "/affected/35/package/name"
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"prerequisites": [],
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{
"name": {
"value": "rubygem-rexml",
"evidence": "/affected/36/package/name"
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"prerequisites": [],
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{
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"evidence": "/affected/36/ranges"
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"affected_versions": []
},
{
"name": {
"value": "rubygem-rss",
"evidence": "/affected/37/package/name"
},
"prerequisites": [],
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{
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"evidence": "/affected/37/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rubygem-test-unit",
"evidence": "/affected/38/package/name"
},
"prerequisites": [],
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{
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"evidence": "/affected/38/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rubygem-typeprof",
"evidence": "/affected/39/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:0.31.1-34.module+el9.8.0+24564+e55418dc",
"evidence": "/affected/39/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rubygems",
"evidence": "/affected/40/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/40/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rubygems-devel",
"evidence": "/affected/41/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/41/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "RHSA-2026:50827",
"aliases": [
"RHSA-2026:50827"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
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"events": [
{
"introduced": "0"
},
{
"fixed": "0:4.0.16-34.module+el9.8.0+24564+e55418dc"
}
]
}
],
"package": {
"name": "rubygems",
"purl": "pkg:rpm/redhat/rubygems",
"ecosystem": "Red Hat:enterprise_linux:9::appstream"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:50827.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0:4.0.16-34.module+el9.8.0+24564+e55418dc"
}
]
}
],
"package": {
"name": "rubygems-devel",
"purl": "pkg:rpm/redhat/rubygems-devel",
"ecosystem": "Red Hat:enterprise_linux:9::appstream"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:50827.json"
}
}
],
"modified": "2026-10-17T10:15:18Z",
"provider": "osv",
"upstream": [
"CVE-2026-27820",
"CVE-2026-42256",
"CVE-2026-42257",
"CVE-2026-47240",
"CVE-2026-47241",
"CVE-2026-47242"
],
"references": [
"https://access.redhat.com/errata/RHSA-2026:50827",
"https://access.redhat.com/security/updates/classification/#important",
"https://bugzilla.redhat.com/show_bug.cgi?id=2459002",
"https://bugzilla.redhat.com/show_bug.cgi?id=2468494",
"https://bugzilla.redhat.com/show_bug.cgi?id=2468500",
"https://bugzilla.redhat.com/show_bug.cgi?id=2491519",
"https://bugzilla.redhat.com/show_bug.cgi?id=2491522",
"https://bugzilla.redhat.com/show_bug.cgi?id=2491523",
"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_50827.json",
"https://access.redhat.com/security/cve/CVE-2026-27820",
"https://www.cve.org/CVERecord?id=CVE-2026-27820",
"https://nvd.nist.gov/vuln/detail/CVE-2026-27820",
"https://github.com/ruby/zlib/security/advisories/GHSA-g857-hhfv-j68w",
"https://hackerone.com/reports/3467067",
"https://access.redhat.com/security/cve/CVE-2026-42256",
"https://www.cve.org/CVERecord?id=CVE-2026-42256",
"https://nvd.nist.gov/vuln/detail/CVE-2026-42256",
"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/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/ruby/net-imap/security/advisories/GHSA-87pf-fpwv-p7m7",
"https://access.redhat.com/security/cve/CVE-2026-42257",
"https://www.cve.org/CVERecord?id=CVE-2026-42257",
"https://nvd.nist.gov/vuln/detail/CVE-2026-42257",
"https://github.com/ruby/net-imap/security/advisories/GHSA-hm49-wcqc-g2xg",
"https://access.redhat.com/security/cve/CVE-2026-47240",
"https://www.cve.org/CVERecord?id=CVE-2026-47240",
"https://nvd.nist.gov/vuln/detail/CVE-2026-47240",
"https://github.com/ruby/net-imap/security/advisories/GHSA-8p34-64r3-mwg8",
"https://access.redhat.com/security/cve/CVE-2026-47241",
"https://www.cve.org/CVERecord?id=CVE-2026-47241",
"https://nvd.nist.gov/vuln/detail/CVE-2026-47241",
"https://github.com/ruby/net-imap/security/advisories/GHSA-c4fp-cxrr-mj66",
"https://access.redhat.com/security/cve/CVE-2026-47242",
"https://www.cve.org/CVERecord?id=CVE-2026-47242",
"https://nvd.nist.gov/vuln/detail/CVE-2026-47242",
"https://github.com/ruby/net-imap/security/advisories/GHSA-46q3-7gv7-qmgg"
]
},
"related_cves": [
{
"value": "CVE-2026-27820",
"evidence": "/upstream"
},
{
"value": "CVE-2026-42256",
"evidence": "/upstream"
},
{
"value": "CVE-2026-42257",
"evidence": "/upstream"
},
{
"value": "CVE-2026-47240",
"evidence": "/upstream"
},
{
"value": "CVE-2026-47241",
"evidence": "/upstream"
},
{
"value": "CVE-2026-47242",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 352984,
"published_at": "2026-08-27T10:14:09+00:00"
}