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TI-2026-54004 Aliases CVE-2026-77414GHSA-2943-5xfg-gq5f

JSONata: Arbitrary Code Execution via crafted JSONata expressions

Priority HIGH 81CWE-94Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-94.

Summary

JSONata is a JSON query and transformation language. Prior to 1.8.8 and 2.2.1, the src/jsonata.js environment.lookup function used a bypassable hasOwnProperty check. Crafted expressions could use $hasOwnProperty, $spread, $string, prototype access, and $constructor to reach the object prototype and invoke process.getBuiltinModule with child_process, executing arbitrary code with the privileges of the host process. This issue is fixed in versions 1.8.8 and 2.2.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0057 47th percentileScored 2026-11-07
Fix Fixed jsonata (jsonata-js): 1.8.8, 2.2.1jsonata (npm): 2.2.1, 1.8.8Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
jsonata-jsjsonatabefore 1.8.8; 2.0.0 to before 2.2.11.8.8, 2.2.1Patch availableCNA
—jsonata (npm)2.0.0 to before 2.2.12.2.1Patch availableGHSA-2943-5xfg-gq5f
—jsonata (npm)before 1.8.81.8.8Patch availableGHSA-2943-5xfg-gq5f
  • jsonata Vendorjsonata-js Affected before 1.8.8; 2.0.0 to before 2.2.1 Fixed in 1.8.8, 2.2.1 Patch available CNA
  • jsonata (npm) Vendor— Affected 2.0.0 to before 2.2.1 Fixed in 2.2.1 Patch available GHSA-2943-5xfg-gq5f
  • jsonata (npm) Vendor— Affected before 1.8.8 Fixed in 1.8.8 Patch available GHSA-2943-5xfg-gq5f

Remediation

  • Fix · CNA jsonata (jsonata-js) Fixed in 1.8.8, 2.2.1
  • Fix · GHSA-2943-5xfg-gq5f jsonata (npm) Fixed in 2.2.1 Advisory →
  • Fix · GHSA-2943-5xfg-gq5f jsonata (npm) Fixed in 1.8.8 Advisory →

Red Hat 1 advisory

  • RHSA-2026:76788 Released 2026-10-06 · Red Hat rating Critical
    Red Hat Developer Hub 1.10.5 Plugin Catalog GA plugins release.
    • Red Hat Developer Hub 1.10 registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-lightspeed, registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-lightspeed-backend, registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-orchestrator +4

Vendor assessments

Red Hat

Red Hat rating: Critical. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Developer Hub 1.10Fixed RHSA-2026:76788
Not affected: 2 products
  • OpenShift Serverless
  • Red Hat Developer Hub 1.10

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-77414
  2. 2026-10-03 Alias added: GHSA-2943-5xfg-gq5f
  3. 2026-10-07 Fix available: RHSA-2026:76788 · Red Hat
  4. 2026-10-07 Fix available: Red Hat Developer Hub 1.10 · Red Hat

References

Other 8

  • TI-2026-54005 JSONata: Arbitrary Code Execution via crafted JSONata expressions CVSS 4.0CRITICAL 9.3
  • TI-2026-54003 JSONata: Arbitrary Code Execution via crafted JSONata expressions CVSS 4.0CRITICAL 9.3
  • TI-2026-10500 jsonata-js jsonata Function Binding Frame System jsonata.js createFrame prototype pollution CVSS 4.0MEDIUM 6.9

Sources

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