Red Hat Security Advisory: Red Hat build of Quarkus 3.20.4.SP1 security update
Affects Red HatSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 2.3 Low.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 22 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Product Security Red Hat | Affected
| Fixed in– |
AI-suggested
Red Hat has released an updated version of the Red Hat build of Quarkus 3.20.4.SP1 that addresses these vulnerabilities. Users should apply this security update after ensuring all previously released errata relevant to their system have been installed. Detailed instructions for applying the update are available in the Red Hat advisory RHSA-2026:0131 and associated documentation. No additional mitigation steps are indicated beyond applying the official update.
Description
This release of Red Hat build of Quarkus 3.20.4.SP1 includes the following CVE fixes: * lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing [quarkus-3.20] (CVE-2025-66566) * lz4-java: lz4-java: Out-of-bounds memory operations lead to denial of service and information disclosure [quarkus-3.20] (CVE-2025-12183) * vertx-web: Eclipse Vert.x cross site scripting [quarkus-3.20 (CVE-2025-11966) For more information, see the release notes page listed in the References section.
References
- access.redhat.com/errata/RHSA-2026:0131 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- access.redhat.com/products/quarkus/ (opens in a new tab)
- access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=redhat.quarkus&downloadType=distributions&version=3.20.4.SP1 (opens in a new tab)
- docs.redhat.com/en/documentation/red_hat_build_of_quarkus/3.20 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_0131.json (opens in a new tab)