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  4. CVE 2026 76763 iosmallryesmallrye graphql smallrye graphql
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Back to active CVEs
High · CVSS 7.5CVE-2026-76763

Io.smallrye/smallrye-graphql: smallrye graphql: unauthenticated denial of service via large exponent float literalsCVE-2026-76763

Answer in brief

CVE-2026-76763 records a High severity (CVSS 7.5) vulnerability in Io.smallrye/smallrye-graphql: smallrye graphql: unauthenticated denial of service via large exponent float literals. The current sources do not mark it as known exploited. The current feed maps Red Hat/smallrye-graphql (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 31, 2026Updated Sep 1, 2026Source checked Oct 15, 2026First seen by HOL Aug 31, 2026Material review Sep 1, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/smallrye-graphql (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/smallrye-graphqlgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/smallrye-graphql.
  2. 2Review the reported fix. Source-reported workaround: To mitigate this issue, applications exposing SmallRye GraphQL endpoints should implement validation and bounding of the precision or exponent for incoming numeric literals before they reach scalar coercion. Additionally, limiting the JVM heap size can help constrain the impact of OutOfMemoryError, though it will not prevent CPU exhaustion. Implementing rate-limiting or timeouts on the GraphQL endpoint can also reduce exposure. Using GraphQL variables instead of inline literals for numeric inputs is a safe alternative, as variables follow a secure parsing path.

Evidence timeline and material changes

  1. Published upstream

    Aug 31, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 31, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-1284
Source
CVE List V5
Source checked
Oct 15, 2026
References
2 linked sources
Open source record