Is CVE-2026-76763 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-76763?

CVE-2026-76763 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-76763

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.