Red Hat Security Advisory: ruby:3.3 security update
Affects Red Hat ruby:3.3Source GCVE Database
Not known to be exploited · CVSS 1.2 Low.
Data as of 5 Nov 2026, 20:48 UTC
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:UExploitation evidence
Disclosed: evidence found.
CVE published 17 Sep 2025
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 5 Nov 2026.
What to do
AI-suggested
Red Hat has released an official security update for Ruby 3.3 in Red Hat Enterprise Linux 9.4 Extended Update Support to fix the REXML denial of service vulnerability. Users should apply the update as described in the Red Hat advisory (https://access.redhat.com/articles/11258) to remediate this issue. No additional mitigation steps are indicated by the vendor.
Description
A denial of service vulnerability (CVE-2025-58767) has been identified in the REXML library component of Ruby 3.3. This issue affects Red Hat Enterprise Linux 9.4 Extended Update Support versions. The vulnerability allows an attacker to cause a denial of service via the REXML module. Red Hat has issued a security update to address this vulnerability with a moderate severity rating.