JSONata is a JSON query and transformation language. Prior to 1.8.8 and 2.2.1, crafted JSONata expressions could chain several object-integrity weaknesses to execute arbitrary code. The chain could overwrite $clone to mutate objects through evaluateTransformExpression, expose and deconstruct JSONata functions or lambdas through $merge.*, replace proc.arguments.forEach used by applyProcedure, and forge internal lambda state. These primitives allowed an attacker to reach prototype getters, prototype and constructor access, and process.getBuiltinModule with child_process, executing code with the privileges of the host process. This issue is fixed in versions 1.8.8 and 2.2.1.
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Affected Vendors & Products
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Thu, 27 Aug 2026 18:00:00 +0000
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ssvc
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Fri, 21 Aug 2026 23:00:00 +0000
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Jsonata-js
Jsonata-js jsonata |
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Jsonata-js
Jsonata-js jsonata |
Fri, 21 Aug 2026 21:15:00 +0000
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| Description | JSONata is a JSON query and transformation language. Prior to 1.8.8 and 2.2.1, crafted JSONata expressions could chain several object-integrity weaknesses to execute arbitrary code. The chain could overwrite $clone to mutate objects through evaluateTransformExpression, expose and deconstruct JSONata functions or lambdas through $merge.*, replace proc.arguments.forEach used by applyProcedure, and forge internal lambda state. These primitives allowed an attacker to reach prototype getters, prototype and constructor access, and process.getBuiltinModule with child_process, executing code with the privileges of the host process. This issue is fixed in versions 1.8.8 and 2.2.1. | |
| Title | JSONata: Arbitrary Code Execution via crafted JSONata expressions | |
| Weaknesses | CWE-94 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-08-21T21:01:09.203Z
Updated: 2026-08-25T16:55:27.467Z
Reserved: 2026-08-20T19:55:27.024Z
Link: CVE-2026-77415
Updated: 2026-08-25T16:54:46.401Z
Status : Deferred
Published: 2026-08-21T21:17:07.553
Modified: 2026-09-09T21:06:39.057
Link: CVE-2026-77415
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