Vulnerability-Lookup

CVE-2026-35523 (GCVE-0-2026-35523)

Vulnerability from cvelistv5 – Published: 2026-04-07 15:58 – Updated: 2026-04-09 16:18

Title

Authentication bypass in strawberry-graphql via legacy graphql-ws WebSocket subprotocol

Summary

Strawberry GraphQL is a library for creating GraphQL APIs. Strawberry up until version 0.312.3 is vulnerable to an authentication bypass on WebSocket subscription endpoints. The legacy graphql-ws subprotocol handler does not verify that a connection_init handshake has been completed before processing start (subscription) messages. This allows a remote attacker to skip the on_ws_connect authentication hook entirely by connecting with the graphql-ws subprotocol and sending a start message directly, without ever sending connection_init. This vulnerability is fixed in 0.312.3.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M

References

URL

Tags

https://github.com/strawberry-graphql/strawberry/…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	strawberry-graphql	strawberry	Affected: < 0.312.3

Show details on NVD website

JSON

To clipboard

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GHSA-VPWC-V33Q-MQ89

Vulnerability from github – Published: 2026-04-06 18:00 – Updated: 2026-04-07 22:09

Summary

strawberry-graphql: Authentication bypass via legacy graphql-ws WebSocket subprotocol

Details

Strawberry up until version 0.312.3 is vulnerable to an authentication bypass on WebSocket subscription endpoints. The legacy graphql-ws subprotocol handler does not verify that a connection_init handshake has been completed before processing start (subscription) messages. This allows a remote attacker to skip the on_ws_connect authentication hook entirely by connecting with the graphql-ws subprotocol and sending a start message directly, without ever sending connection_init.

The graphql-transport-ws subprotocol handler is not affected, as it correctly gates subscription operations on a connection_acknowledged flag. However, both subprotocols are enabled by default in all framework integrations that support websockets, and the subprotocol is selected by the client via the Sec-WebSocket-Protocol header.

Any application relying on on_ws_connect for authentication or authorization is affected.

Mitigation: Upgrade to the patched version, or explicitly disable the legacy graphql-ws subprotocol by setting subscription_protocols=[GRAPHQL_TRANSPORT_WS_PROTOCOL] on your GraphQL view/router.

Severity ?

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.312.2"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "strawberry-graphql"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.312.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-35523"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-06T18:00:26Z",
    "nvd_published_at": "2026-04-07T17:16:31Z",
    "severity": "HIGH"
  },
  "details": "Strawberry up until version `0.312.3` is vulnerable to an authentication bypass on WebSocket subscription endpoints. The legacy graphql-ws subprotocol handler does not verify that a `connection_init` handshake has been completed before processing start (subscription) messages. This allows a remote attacker to skip the `on_ws_connect` authentication hook entirely by connecting with the graphql-ws subprotocol and sending a start message directly, without ever sending `connection_init`.\n\nThe graphql-transport-ws subprotocol handler is not affected, as it correctly gates subscription operations on a connection_acknowledged flag. However, both subprotocols are enabled by default in all framework integrations that support websockets, and the subprotocol is selected by the client via the Sec-WebSocket-Protocol header.\n\nAny application relying on `on_ws_connect` for authentication or authorization is affected.\n\nMitigation: Upgrade to the patched version, or explicitly disable the legacy graphql-ws subprotocol by setting `subscription_protocols=[GRAPHQL_TRANSPORT_WS_PROTOCOL]` on your GraphQL view/router.",
  "id": "GHSA-vpwc-v33q-mq89",
  "modified": "2026-04-07T22:09:42Z",
  "published": "2026-04-06T18:00:26Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-vpwc-v33q-mq89"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35523"
    },
    {
      "type": "WEB",
      "url": "https://github.com/strawberry-graphql/strawberry/commit/0977a4e6b41b7cfe3e9d8ba84a43458a2b0c54c2"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/strawberry-graphql/strawberry"
    },
    {
      "type": "WEB",
      "url": "https://github.com/strawberry-graphql/strawberry/releases/tag/0.312.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "strawberry-graphql: Authentication bypass via legacy graphql-ws WebSocket subprotocol"
}

FKIE_CVE-2026-35523

Vulnerability from fkie_nvd - Published: 2026-04-07 17:16 - Updated: 2026-04-17 20:37

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-vpwc-v33q-mq89	Vendor Advisory

Impacted products

	Vendor	Product	Version
	strawberry	strawberry_graphql	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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    }
  ],
  "id": "CVE-2026-35523",
  "lastModified": "2026-04-17T20:37:20.757",
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-35523 (GCVE-0-2026-35523)

GHSA-VPWC-V33Q-MQ89

FKIE_CVE-2026-35523

Tags

Sightings

Nomenclature