Vulnerability in Red Hat Build Of Quarkus
CVE-2026-76763
A flaw was found in SmallRye GraphQL. The number scalar coercion for BigInteger does not properly validate the magnitude of float or string inputs. An unauthenticated remote attacker can exploit this by sending a GraphQL query containing a large exponent float literal. This can lead to the allocation of extremely large BigInteger objects, causing CPU exhaustion or an OutOfMemoryError, resulting in a denial of service.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
Frequently asked questions
- What is CVE-2026-76763?
- CVE-2026-76763 is a high-severity vulnerability in Red Hat Build Of Quarkus, classified under Improper Validation of Specified Quantity in Input. CVSS score: 7.5/10. Published 2026-08-31.
- How severe is CVE-2026-76763?
- High severity. CVSS v3 base score is 7.5 out of 10.