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TI-2026-54003 Aliases CVE-2026-77413GHSA-8gq3-vp5j-2grp

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 2.2.0, the src/functions.js lookup function lacked an Object.prototype.hasOwnProperty check and allowed crafted expressions to access inherited prototype members. An attacker able to supply an expression could use inherited prototype setters and getters, constructor access, valueOf, and process.getBuiltinModule to reach the child_process module and execute arbitrary code with the privileges of the host process. This issue is fixed in versions 1.8.8 and 2.2.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00719 54th percentileScored 2026-11-07
Fix Fixed jsonata (jsonata-js): 2.2.0jsonata (npm): 1.8.8, 2.2.0Red 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 2.2.02.2.0Patch availableCNA
—jsonata (npm)before 1.8.81.8.8Patch availableGHSA-8gq3-vp5j-2grp
—jsonata (npm)2.0.0 to before 2.2.02.2.0Patch availableGHSA-8gq3-vp5j-2grp
  • jsonata Vendorjsonata-js Affected before 2.2.0 Fixed in 2.2.0 Patch available CNA
  • jsonata (npm) Vendor— Affected before 1.8.8 Fixed in 1.8.8 Patch available GHSA-8gq3-vp5j-2grp
  • jsonata (npm) Vendor— Affected 2.0.0 to before 2.2.0 Fixed in 2.2.0 Patch available GHSA-8gq3-vp5j-2grp

Remediation

  • Fix · CNA jsonata (jsonata-js) Fixed in 2.2.0
  • Fix · GHSA-8gq3-vp5j-2grp jsonata (npm) Fixed in 1.8.8 Advisory →
  • Fix · GHSA-8gq3-vp5j-2grp jsonata (npm) Fixed in 2.2.0 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-2026-77413
  2. 2026-10-03 Alias added: GHSA-8gq3-vp5j-2grp
  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 7

  • TI-2026-54005 JSONata: Arbitrary Code Execution via crafted JSONata expressions CVSS 4.0CRITICAL 9.3
  • TI-2026-54004 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