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TI-2026-82206 Aliases CVE-2026-118665GHSA-434m-5hcj-pxf3

Stale connection parameters in GraphQL Tools WebSocket executor

Priority HIGH 69CWE-613Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-613.

Summary

The GraphQL Tools legacy WebSocket executor (@graphql-tools/executor-legacy-ws) before 1.1.36 keeps connection parameters from earlier requests after a connection closes. When one executor is reused across authorization contexts, a later request that omits a sensitive key sends an earlier caller's Authorization or tenant value, so the downstream server authenticates the later caller as the earlier user. Applications that create a new executor for every request are not affected. The flaw is classified as CWE-613.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. Prior to version 1.1.36 of the GraphQL Tools legacy WebSocket executor package, buildWSLegacyExecutor in packages/executors/legacy-ws/src/index.ts retains request.extensions.connectionParams in the closure-scoped executorConnectionParams object after cleanupWebsocket closes a connection. When one executor is reused across different authorization contexts, a later request that omits a sensitive key can send an earlier caller's Authorization or tenant value in its connection_init payload, causing the downstream server to authenticate the later caller as the earlier user. Applications that create a new executor for every request are not affected. This issue is fixed in version 1.1.36 of the GraphQL Tools legacy WebSocket executor package.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00388 33rd percentileScored 2026-11-07
Fix Fixed graphql-tools (ardatan): 9.0.36executor-legacy-ws (@graphql-tools): 1.1.36+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ardatangraphql-toolsbefore 9.0.369.0.36Patch availableCNA
@graphql-toolsexecutor-legacy-wsbefore 1.1.361.1.36Patch availableCNA
—@graphql-tools/executor-legacy-ws (npm)before 1.1.361.1.36Patch availableGHSA-434m-5hcj-pxf3
  • graphql-tools Vendorardatan Affected before 9.0.36 Fixed in 9.0.36 Patch available CNA
  • executor-legacy-ws Vendor@graphql-tools Affected before 1.1.36 Fixed in 1.1.36 Patch available CNA
  • @graphql-tools/executor-legacy-ws (npm) Vendor— Affected before 1.1.36 Fixed in 1.1.36 Patch available GHSA-434m-5hcj-pxf3

Remediation

Upgrade @graphql-tools/executor-legacy-ws to 1.1.36 or later. The graphql-tools package is fixed in 9.0.36, so upgrade graphql-tools to 9.0.36 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA graphql-tools (ardatan) Fixed in 9.0.36
  • Fix · CNA executor-legacy-ws (@graphql-tools) Fixed in 1.1.36
  • Fix · GHSA-434m-5hcj-pxf3 @graphql-tools/executor-legacy-ws (npm) Fixed in 1.1.36 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-28 Threatist record created from CVE-2026-118665
  2. 2026-10-28 Alias added: GHSA-434m-5hcj-pxf3
  3. 2026-10-28 Fix available: npm/@graphql-tools/[email protected] · GHSA-434m-5hcj-pxf3
  4. 2026-10-28 CVSS score added · GHSA-434m-5hcj-pxf3
  5. 2026-10-28 Weakness changed · GHSA-434m-5hcj-pxf3
  6. 2026-10-28 5 new references · GHSA-434m-5hcj-pxf3
  7. 2026-10-30 Priority changed: MEDIUM → LOW
  8. 2026-11-03 CISA SSVC decision points changed
  9. 2026-11-03 Priority changed: LOW → HIGH
  10. 2026-11-06 Affected versions changed · Red Hat
  11. 2026-11-06 CVSS score added · Red Hat

References

Other 5

  • TI-2026-82207 GraphQL Tools legacy WebSocket executor misroutes subscription data CVSS 4.0MEDIUM 6.0
  • TI-2026-85665 Prototype pollution in GraphQL Tools mergeIncrementalResult helper CVSS 4.0HIGH 8.4
  • TI-2026-68299 Prototype pollution in GraphQL Tools mergeDeep function CVSS 4.0HIGH 8.2
  • TI-2026-65765 GraphQL Tools: TLS Certificate Validation Disabled in Legacy GraphQL WebSocket Executor CVSS 3.1HIGH 7.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences