Bug 2521208 (CVE-2026-77413)

Summary:	CVE-2026-77413 jsonata: JSONata: Arbitrary Code Execution via crafted JSONata expressions
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	unspecified	CC:	abarbaro, alizardo, dhanak, drosa, dsimansk, gbenhaim, jchui, jhe, kingland, ktsao, mnovotny, nboldt, niyer, oaljalju, psrna, sausingh, twaugh
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in JSONata. The `lookup` function, a component of the JSONata query and transformation language, did not properly validate object properties. This oversight allowed an attacker to craft malicious expressions that could access and manipulate sensitive inherited prototype members. Consequently, a remote attacker could exploit this vulnerability to execute arbitrary code with the privileges of the host process.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-21 21:02:26 UTC

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.