SCA: security update for @graphql-tools/executor-legacy-ws (GHSA-mp66-8ww2-pcwm)

medium Tenable Cloud Security Plugin ID 477836

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

- 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 reuses one WebSocket and replaces its single websocket.onmessage
handler whenever a new overlapping subscription starts. The handler delivers LEGACY_WS.DATA frames to the
newest observer without comparing data.id with the subscription operation id, so a caller using the same
executor can receive another user's authorized subscription payload while the earlier caller's stream is
starved. This issue is fixed in version 1.1.36 of the GraphQL Tools legacy WebSocket executor package.
(CVE-2026-118666)

Solution

Update the @graphql-tools/executor-legacy-ws library and its related packages to version 1.1.36 or later.

Plugin Details

Severity: Medium

ID: 477836

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/29/2026

Updated: 10/29/2026

Risk Information

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2026-118666

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6

Threat Score: 2.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/28/2026

Vulnerability Publication Date: 10/28/2026

Reference Information

CVE: CVE-2026-118666

cwe: CWE-200

Detections

Analytics