Red Hat Security Advisory: ruby:3.3 security, bug fix, and enhancement update
Affects Red Hat ruby:3.3 security,Source GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 9.9 Critical · fixed in Red Hat package updates : patch Red Hat gitlab as a priority.
Data as of 9 Nov 2026, 06:52 UTC
Thin evidence
One scorer or none| CNA (GitLab) | CVSS 3.1 | 9.9 |
|---|
- Patch
- Available – fixed in 19.4.1, 19.3.3, 19.2.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:LExploitation evidence
Disclosed: evidence found.
CVE published 23 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.
What to do
Upgrade GitLab and gitlab to 19.4.1, 19.3.3 or 19.2.7.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| GitLabGitLab | Affected
| Fixed in
|
| GitLabGitLab | Affected
| Fixed in
|
| GitLabGitLab | Affected
| Fixed in
|
RubyGemsgitlabpkg:gem/gitlabOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A security update for Ruby 3.3 is available from Red Hat for Red Hat Enterprise Linux 9. Users should apply this update to incorporate the fixes for the double free and integer overflow vulnerabilities. Refer to the Red Hat advisory RHSA-2026:96068 and the update instructions at https://access.redhat.com/articles/11258 for guidance on applying the patch. No additional mitigation steps are indicated.
Description
Multiple security vulnerabilities have been identified in Ruby 3.3, including a double free issue in the regular expression parser and several integer overflow issues in the regular expression compiler. These vulnerabilities have been addressed in a security update released by Red Hat for Red Hat Enterprise Linux 9. The update rebases Ruby 3.3 to the latest upstream release, incorporating these security fixes along with bug fixes and enhancements.
References
- access.redhat.com/errata/RHSA-2026:96068 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2539836 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2539842 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2550153 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2558632 (opens in a new tab)
- issues.redhat.com/browse/RHEL-290989 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_96068.json (opens in a new tab)