Red Hat Security Advisory: Red Hat build of Quarkus 3.27.1.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, 14:05 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
A security update for Red Hat build of Quarkus 3.27.1.SP1 is available that addresses these vulnerabilities. Users should apply this update after ensuring all previously released relevant errata are installed. Refer to the official Red Hat documentation for detailed update instructions. No additional mitigation steps are indicated by the vendor.
Description
This release of Red Hat build of Quarkus 3.27.1.SP1 includes the following CVE fixes: * lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing [quarkus-3.27] (CVE-2025-66566) * lz4-java: lz4-java: Out-of-bounds memory operations lead to denial of service and information disclosure [quarkus-3.27] (CVE-2025-12183) * vertx-web: Eclipse Vert.x cross site scripting [quarkus-3.27] (CVE-2025-11966) For more information, see the release notes page listed in the References section.
References
- access.redhat.com/errata/RHSA-2026:0134 (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=3.27.1.SP1 (opens in a new tab)
- docs.redhat.com/en/documentation/red_hat_build_of_quarkus/3.27 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_0134.json (opens in a new tab)