Bug 2519767 (CVE-2026-76763) - CVE-2026-76763 io.smallrye/smallrye-graphql: SmallRye GraphQL: Unauthenticated Denial of Service via large exponent float literals
Summary: CVE-2026-76763 io.smallrye/smallrye-graphql: SmallRye GraphQL: Unauthenticate...
Keywords:
Status: NEW
Alias: CVE-2026-76763
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-19 17:00 UTC by Patrick Del Bello
Modified: 2026-08-31 12:05 UTC (History)
22 users (show)

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Description Patrick Del Bello 2026-08-19 17:00:31 UTC 
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.
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