strawberry-graphql Strawberry GraphQL up to 0.312.3/0.327.1 Subscription handlers.py resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k1.11-

Summaryinfo

A vulnerability labeled as problematic has been found in strawberry-graphql Strawberry GraphQL up to 0.312.3/0.327.1. This affects an unknown part of the file strawberry/subscriptions/protocols/graphql_ws/handlers.py of the component Subscription Handler. Such manipulation leads to resource consumption. This vulnerability is referenced as CVE-2026-107727. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in strawberry-graphql Strawberry GraphQL up to 0.312.3/0.327.1 and classified as problematic. Affected by this issue is an unknown part of the file strawberry/subscriptions/protocols/graphql_ws/handlers.py of the component Subscription Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

Strawberry GraphQL is a library for creating GraphQL APIs. From 0.312.3 until 0.327.2, the legacy graphql-ws subscription handler in strawberry/subscriptions/protocols/graphql_ws/handlers.py does not remove naturally completed operations from self.tasks and self.subscriptions. When max_subscriptions_per_connection is configured, a client on a persistent WebSocket connection can use distinct operation IDs for one-shot subscriptions to fill the connection's configured slots even after those subscriptions send complete, causing later legitimate operations on that connection to be rejected with Subscription limit reached. The modern graphql-transport-ws protocol and deployments without the configured per-connection cap are not affected. This issue is fixed in version 0.327.2.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-107727 since 10/08/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 0.327.2 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.7
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Strawberry GraphQL 0.327.2

Timelineinfo

10/08/2026 CVE reserved
10/08/2026 +0 days VulDB entry created
10/09/2026 +0 days Advisory disclosed
10/09/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-107727 (🔒)
GCVE (CVE): GCVE-0-2026-107727
GCVE (VulDB): GCVE-100-415670

Entryinfo

Created: 10/09/2026 00:47
Changes: 10/09/2026 00:47 (65)
Complete: 🔍
Cache ID: 216::103

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