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Vulnerability record · CVE-2026-76763 · published 31 August 2026

CVE-2026-76763: A flaw was found in SmallRye GraphQL.

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.

7.5 CVSS 3.1 High EPSS 0.61% · top 53.1% CWE-1284 · CWE-1284 Awaiting Analysis
7.5CVSS 3.1 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
1 Sep 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

LinkTags
https://access.redhat.com/security/cve/CVE-2026-76763
https://bugzilla.redhat.com/show_bug.cgi?id=2519767

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Source: NIST National Vulnerability Database (record CVE-2026-76763), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.