SB2026010706 - Multiple vulnerabilities in Red Hat build of Quarkus 3.27.1
Published: January 7, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Information disclosure (CVE-ID: CVE-2025-66566)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the application insufficiently clears the output buffer in Java-based decompressor implementations. In applications where the output buffer is reused without being cleared, this may lead to disclosure of sensitive data.
Note, JNI-based implementations are not affected.
2) Out-of-bounds read (CVE-ID: CVE-2025-12183)
The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service attack.
The vulnerability exists due to a boundary condition. A remote attacker can pass specially crafted compressed input to the application, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service attack.
3) Stored cross-site scripting (CVE-ID: CVE-2025-11966)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in directory listings within file names. A remote user can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Remediation
Install update from vendor's website.