IBM Quarkus 3.27.x-3.27.5 / 3.33.x Auth Bypass via URL Query
CVE-2026-19651 Published on September 8, 2026
IBM Enterprise Build of Quarkus is affected by multiple vulnerabilities
IBM Enterprise Build of Quarkus 3.27.1 through 3.27.5, and 3.33.1 through 3.33.3 could allow an attacker to bypass authorization by manipulating URL query parameters due to incorrect mapping of values to untrusted query string input.
Vulnerability Analysis
CVE-2026-19651 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-19651 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Products Associated with CVE-2026-19651
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Affected Versions
IBM Enterprise Build of Quarkus:- Version 3.27.1, <= 3.27.5 is affected.
- Version 3.33.1, <= 3.33.3 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.