CVE-2026-76763
Io.smallrye/smallrye-graphql: smallrye graphql: unauthenticated denial of service via large exponent float literals
- State
- Published
- Severity
- 7.5 High
- Published
- Aug 31, 2026
- Updated
- Oct 20, 2026
- Reserved
- Aug 19, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat |
Weaknesses
- CWE-1284 Improper Validation of Specified Quantity in Input
Affected Products
| Product | Versions |
|---|---|
Red Hat build of Quarkus 3.27.5.SP1Red Hat |
|
Red Hat build of Quarkus 3.33.3.SP1Red Hat |
|
References
- RHSA-2026:62515vendor-advisory
- RHSA-2026:62555vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-76763vdb-entry
- RHBZ#2519767issue-tracking
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.