GHSA-qr3m-xw4c-jqw3
Suggest an improvement- Source
- https://github.com/advisories/GHSA-qr3m-xw4c-jqw3
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-qr3m-xw4c-jqw3/GHSA-qr3m-xw4c-jqw3.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-qr3m-xw4c-jqw3
- Aliases
- Published
- 2026-04-16T21:09:40Z
- Modified
- 2026-05-05T16:10:29Z
- Severity
-
- 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H CVSS Calculator
- Summary
- ChilliCream GraphQL Platform: Utf8GraphQLParser Stack Overflow via Deeply Nested GraphQL Documents
- Details
-
Impact
Hot Chocolate's
Utf8GraphQLParseris a recursive descent parser with no recursion depth limit. A crafted GraphQL document with deeply nested selection sets, object values, list values, or list types can trigger aStackOverflowExceptionon payloads as small as 40 KB.Because
StackOverflowExceptionis uncatchable in .NET (since .NET 2.0), the entire worker process is terminated immediately. All in-flight HTTP requests, backgroundIHostedServicetasks, and open WebSocket subscriptions on that worker are dropped. The orchestrator (Kubernetes, IIS, etc.) must restart the process.This occurs before any validation rules run —
MaxExecutionDepth, complexity analyzers, persisted query allow-lists, and customIDocumentValidatorRuleimplementations cannot intercept the crash becauseUtf8GraphQLParser.Parseis invoked before validation. The existingMaxAllowedFields=2048limit does not help because the crashing payloads contain very few fields.Severity: Critical (9.1) —
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HPatches
- v12 line: Fixed in
12.22.7 - v13 line: Fixed in
13.9.16 - v14 line: Fixed in
14.3.1 - v15 line: Fixed in
15.1.14
The fix adds a
MaxAllowedRecursionDepthoption toParserOptionswith a safe default, and enforces it across all recursive parser methods (ParseSelectionSet,ParseValueLiteral,ParseObject,ParseList,ParseTypeReference, etc.). When the limit is exceeded, a catchableSyntaxExceptionis thrown instead of overflowing the stack.Workarounds
There is no application-level workaround.
StackOverflowExceptioncannot be caught in .NET. The only mitigation is to upgrade to a patched version.Operators can reduce (but not eliminate) risk by limiting HTTP request body size at the reverse proxy or load balancer layer, though the smallest crashing payload (40 KB) is well below most default body size limits and is highly compressible (~few hundred bytes via gzip).
References
- v12 line: Fixed in
- Database specific
{ "cwe_ids": [ "CWE-674" ], "github_reviewed": true, "github_reviewed_at": "2026-04-16T21:09:40Z", "nvd_published_at": "2026-04-18T00:16:36Z", "severity": "CRITICAL" }- References
-
- https://github.com/ChilliCream/graphql-platform/security/advisories/GHSA-qr3m-xw4c-jqw3
- https://nvd.nist.gov/vuln/detail/CVE-2026-40324
- https://github.com/ChilliCream/graphql-platform/pull/9528
- https://github.com/ChilliCream/graphql-platform/pull/9530
- https://github.com/ChilliCream/graphql-platform/pull/9531
- https://github.com/ChilliCream/graphql-platform/commit/08c0caa42ca33c121bbed49d2db892e5bf6fb541
- https://github.com/ChilliCream/graphql-platform/commit/4cbaf67d366f800fc1e484bc5c06dfcf27b45023
- https://github.com/ChilliCream/graphql-platform/commit/b185eb276c9ee227bd44616ff113be7f01a66c69
- https://github.com/ChilliCream/graphql-platform/commit/b9271e6a500484c002fd528dcd34d1a9b445480f
- https://github.com/ChilliCream/graphql-platform
- https://github.com/ChilliCream/graphql-platform/releases/tag/12.22.7
- https://github.com/ChilliCream/graphql-platform/releases/tag/13.9.16
- https://github.com/ChilliCream/graphql-platform/releases/tag/14.3.1
- https://github.com/ChilliCream/graphql-platform/releases/tag/15.1.14
Affected packages
NuGet / HotChocolate.Language
Package
- Name
- HotChocolate.Language
- View open source insights on deps.dev
- Purl
- pkg:nuget/HotChocolate.Language
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed12.22.7
Affected versions
0.*
1.*
9.*
10.*
11.*
12.*
NuGet / HotChocolate.Language
Package
- Name
- HotChocolate.Language
- View open source insights on deps.dev
- Purl
- pkg:nuget/HotChocolate.Language
NuGet / HotChocolate.Language
Package
- Name
- HotChocolate.Language
- View open source insights on deps.dev
- Purl
- pkg:nuget/HotChocolate.Language
NuGet / HotChocolate.Language
Package
- Name
- HotChocolate.Language
- View open source insights on deps.dev
- Purl
- pkg:nuget/HotChocolate.Language