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CVE-2025-11966VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat build of Quarkus 3.20.4.SP1 security update

Affects Red HatSource GCVE Database

0

Mentioned vulnerabilities

Authoritative record:CVE-2025-11966· Low 2.3

Not known to be exploited · CVSS 2.3 Low.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 4.0 base score
2.3Low
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Oct 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
Red Hat Product Security Red HatAffected
  • Red Hat
  • Red Hat build of Quarkus
  • Red Hat build of Quarkus 3.20.4.SP1
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

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