CVE-2026-76763: Improper Validation of Specified Quantity in Input in Red Hat Red Hat build of Quarkus
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.
CVE-2026-76763: Improper Validation of Specified Quantity in Input in Red Hat Red Hat build of Quarkus
Description
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 v3.1
Score 7.5high
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-08-19T16:58:05.744Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-76763","vendor":"Red Hat"}]
Threat ID: 6a958ab9acd9273b492f08c1
Added to database: 08/31/2026, 14:07:53 UTC
Last updated: 08/31/2026, 15:39:57 UTC
Views: 3
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