CVE-2026-35523: Strawberry GraphQL is a library for creating GraphQL APIs

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HIGH 7.5REMOTEUPGRADE

CVE-2026-35523 is a high-severity flaw (CVSS 7.5) affecting strawberry graphql. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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-w

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-04-07
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: strawberry

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-07 17:16 UTCPublished CVE record published
2026-06-17 10:40 UTCUpdated Record last modified

strawberry strawberry graphql UPGRADE

Affected: < 0.312.3

Fixed in: 0.312.3

Safe to downgrade to: no unaffected older release

1. Check installed version

pip show strawberry-graphql

2. UPGRADE to 0.312.3

pip install --upgrade "strawberry-graphql>=0.312.3"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-35523?

strawberry graphql: upgrade to 0.312.3. Exact commands for each OS are on this page.

Is CVE-2026-35523 being exploited?

CVE-2026-35523 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-35523 affect?

CVE-2026-35523 affects strawberry graphql. Severity is high (CVSS 7.5). 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 c

How urgent is CVE-2026-35523?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-47707 MEDIUM 5.3 UPGRADE Strawberry GraphQL is a library for creating GraphQL APIs
CVE-2026-47706 MEDIUM 5.3 UPGRADE Strawberry GraphQL is a library for creating GraphQL APIs
CVE-2026-45739 LOW 3.1 UPGRADE Strawberry GraphQL is a library for creating GraphQL APIs
CVE-2026-35526 HIGH 7.5 UPGRADE Strawberry GraphQL is a library for creating GraphQL APIs

References

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