{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-35523", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-03T02:15:39.281Z", "datePublished": "2026-04-07T15:58:17.694Z", "dateUpdated": "2026-04-09T16:18:51.112Z"}, "containers": {"cna": {"title": "Authentication bypass in strawberry-graphql via legacy graphql-ws WebSocket subprotocol", "problemTypes": [{"descriptions": [{"cweId": "CWE-306", "lang": "en", "description": "CWE-306: Missing Authentication for Critical Function", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-vpwc-v33q-mq89", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-vpwc-v33q-mq89"}], "affected": [{"vendor": "strawberry-graphql", "product": "strawberry", "versions": [{"version": "< 0.312.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-07T15:58:17.694Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-vpwc-v33q-mq89", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-09T16:11:53.120304Z", "id": "CVE-2026-35523", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-09T16:18:51.112Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-35523", "lastModified": "2026-04-08T21:27:00.663", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-07T17:16:31.583", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-vpwc-v33q-mq89"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-306"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.312.3)"}}], "enrichment": {"confidence": 84.0, "confidence_source": "matching", "scores": [{"score": 84.0, "source": "matching"}]}, "original": {"product": "strawberry", "source": "cna", "vendor": "strawberry-graphql"}, "product": "strawberry", "vendor": "strawberry"}], "analysis": {"en": {"generated_at": "2026-04-07T22:45:14.291427+00:00", "value": {"mitigation_remediation": ["Upgrade strawberry-graphql to version 0.312.3 or newer.", "If upgrading is delayed, reconfigure the WebSocket server to enforce a connection_init handshake before processing any start messages.", "Consider disabling the legacy graphql-ws subprotocol if it is not required for your application."], "summary": {"action": "Immediate Patch", "impact": "Authentication Bypass"}, "threat_synthesis": {"affected_systems": "This vulnerability affects the strawberry-graphql library for projects using versions earlier than 0.312.3. The flaw exists in the GraphQL library itself and applies to any deployment that accepts WebSocket connections using the legacy graphql-ws subprotocol.", "description_and_impact": "A flaw in strawberry-graphql allows an unauthenticated attacker to bypass authentication on WebSocket subscription endpoints. The legacy graphql-ws subprotocol handler fails to verify that a connection_init handshake has taken place before handling start messages. An attacker can therefore skip the on_ws_connect authentication hook and begin a subscription without providing valid credentials, potentially exposing sensitive data or enabling further interaction with the API. The weakness corresponds to an authentication bypass scenario.", "risk_and_exploitability": "The CVSS score of 7.5 indicates a high severity for remote unauthenticated exploitation. No EPSS score is available, and the vulnerability is not listed in the CISA KEV catalog, but the absence of a mitigation that requires client credentials suggests that exploitation is likely straightforward for an attacker with network access to the WebSocket endpoint."}}}}, "created": "2026-04-08T19:48:05.754381+00:00", "updated": "2026-04-09T08:24:08.922622+00:00", "vendors": ["strawberry", "strawberry$PRODUCT$strawberry"]}