Auth bypass in Quarkus
CVE-2026-39852
Quarkus is a Java framework for building cloud-native applications. In versions prior to 3.20.6.1, 3.27.3.1, 3.33.1.1, 3.35.1.1, 3.34.7, and 3.35.2, a path normalization inconsistency between the security layer and the routing layer allows…
Vulnerability class: Broken Access Control
EPSS: 0.000 (3.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
Affected products
- Quarkus
- Quarkusio Quarkus — versions < 3.20.6.1, >= 3.27.3.0, < 3.27.3.1, >= 3.34.0, < 3.34.7
Weakness classification (CWE)
References
- https://github.com/quarkusio/quarkus/security/advisories/GHSA-rc95-pcm8-65v9 (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-39852?
- CVE-2026-39852 is a high-severity vulnerability in Quarkus, classified under Incorrect Authorization. CVSS score: 8.2/10. Published 2026-05-05.
- How severe is CVE-2026-39852?
- High severity. CVSS v3 base score is 8.2 out of 10.