CVE-2026-114604
GraphQL Tools: Prototype pollution in mergeIncrementalResult via non-primitive path segments
GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. From 10.10.1 until 12.0.2, the @graphql-tools/utils mergeIncrementalResult helper passes incrementalResult.path segments to setObjectKeyPath without runtime primitive-type validation. A non-primitive segment can bypass strict comparisons against __proto__, constructor, and prototype, then be coerced during property access so a malicious or compromised upstream incremental GraphQL response writes attacker-controlled properties to Object.prototype in the consuming Node.js process. The affected implementation is packages/utils/src/mergeIncrementalResult.ts and is reachable when consumers merge untrusted @defer or @stream transport results. This issue is fixed in version 12.0.2.
Fixes and workarounds
Fix
@graphql-tools/utils (npm): GitHub reports patched versions >=12.0.2. Check the advisory for the affected release branch.
Source: GitHub GHSA-c4qx-w738-7hr3Fix
@graphql-tools/utils (npm): OSV reports a fixed version 12.0.2. Check the advisory for supported release branches.
Source: OSV GHSA-c4qx-w738-7hr3Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| graphql-tools ardatan |
>= 10.10.1, < 12.0.2 (affected) | CNA: GitHub_M |
@graphql-tools/utils@graphql-tools/utils
npm |
>=10.10.1 <=12.0.1 (affected, GitHub advisory range) | GitHub GHSA-c4qx-w738-7hr3 |
@graphql-tools/utils@graphql-tools/utils
npm |
≥ 10.10.1; < 12.0.2 (affected, semver); OSV events: introduced 10.10.1; fixed 12.0.2Source events (semver)Other versions: unaffected |
OSV GHSA-c4qx-w738-7hr3 |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.4 high |
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N | CNA: GitHub_M |
| 4.0 / 8.4 high |
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
Exploit evidence
- https://github.com/ardatan/graphql-tools/security/advisories/GHSA-c4qx-w738-7hr3
exploit · ADP: CISA-ADP
References
- https://github.com/ardatan/graphql-tools/security/advisories/GHSA-c4qx-w738-7hr3CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/ardatan/graphql-tools/pull/8467CNA: GitHub_M · x_refsource_MISC
- https://github.com/ardatan/graphql-tools/commit/19f5b3373fd7ace0688d19950fc529ce8347952aCNA: GitHub_M · x_refsource_MISC
- https://github.com/ardatan/graphql-tools/commit/20d36a5c6eb8fd5524420988e01a48618c450d70CNA: 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-c4qx-w738-7hr3ADP: CISA-ADP · exploit
- https://github.com/ardatan/graphql-tools/commit/19f5b3373fd7ace0688d19950fc529ce8347952a[email protected]
- https://github.com/ardatan/graphql-tools/commit/20d36a5c6eb8fd5524420988e01a48618c450d70[email protected]
- https://github.com/ardatan/graphql-tools/pull/8467[email protected]
- https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/[email protected][email protected]
- https://github.com/ardatan/graphql-tools/security/advisories/GHSA-c4qx-w738-7hr3[email protected]
- https://github.com/ardatan/graphql-tools/security/advisories/GHSA-c4qx-w738-7hr3GitHub Security Advisories · advisory
- https://github.com/advisories/GHSA-c4qx-w738-7hr3OSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-c4qx-w738-7hr3OSV / GitHub Security Advisories · osv
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