Red Hat Security Advisory: Red Hat build of Quarkus 3.20.5 release and security update
Affects Red HatSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 6.6 Medium · fixed in Red Hat package updates : update Red Hat when convenient.
Data as of 26 Oct 2026, 16:39 UTC
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 52% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 3.2
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:UExploitation evidence
Disclosed: evidence found.
CVE published 22 Sep 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.
Description
This release of Red Hat build of Quarkus 3.20.5 includes the following CVE fixes: * netty-codec-http: Netty (netty-codec-http): Request Smuggling via CRLF Injection [quarkus-3.20] (CVE-2025-67735) * common: Timing Attack Vulnerability in SCRAM Authentication [quarkus-3.20] (CVE-2025-59432) * quarkus-rest: Quarkus REST Worker Thread Exhaustion Vulnerability [quarkus-3.20] (CVE-2025-66560) For more information, see the release notes page listed in the References section.
References
- access.redhat.com/errata/RHSA-2026:1899 (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=3.20.5 (opens in a new tab)
- docs.redhat.com/en/documentation/red_hat_build_of_quarkus/3.20 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-6612 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-6800 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-6939 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-7109 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-7110 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-7111 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-7112 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-7113 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-7114 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-7117 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-7119 (opens in a new tab)
- issues.redhat.com/browse/QUARKUS-7120 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_1899.json (opens in a new tab)