CVE-2026-118665
GraphQL Tools: Per-request connection parameters persist into later users' WebSocket authentications
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.
Fixes and workarounds
Fix
@graphql-tools/executor-legacy-ws (npm): OSV reports a fixed version 1.1.36. Check the advisory for supported release branches.
Source: OSV GHSA-434m-5hcj-pxf3Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| graphql-tools ardatan |
< 9.0.36 (affected) | CNA: GitHub_M |
| executor-legacy-ws @graphql-tools |
< 1.1.36 (affected) | CNA: GitHub_M |
@graphql-tools/executor-legacy-ws@graphql-tools/executor-legacy-ws
npm |
≥ 0; < 1.1.36 (affected, semver); OSV events: introduced 0; fixed 1.1.36Source events (semver)Other versions: unaffected |
OSV GHSA-434m-5hcj-pxf3 |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.2 high |
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | CNA: GitHub_M |
Exploit evidence
- https://github.com/ardatan/graphql-tools/security/advisories/GHSA-434m-5hcj-pxf3
exploit · ADP: CISA-ADP
References
- https://github.com/ardatan/graphql-tools/security/advisories/GHSA-434m-5hcj-pxf3CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/ardatan/graphql-tools/pull/8480CNA: GitHub_M · x_refsource_MISC
- https://github.com/ardatan/graphql-tools/commit/c2f226e6f68236be9e4a577f29faeaa92547458bCNA: GitHub_M · x_refsource_MISC
- https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/[email protected]CNA: GitHub_M · x_refsource_MISC
- https://github.com/ardatan/graphql-tools/security/advisories/GHSA-434m-5hcj-pxf3ADP: CISA-ADP · exploit
- https://github.com/advisories/GHSA-434m-5hcj-pxf3OSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-434m-5hcj-pxf3OSV / GitHub Security Advisories · osv
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