{"id":"CVE-2026-77415","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77415","generatedAt":"2026-10-28T00:51:20.184Z","title":"Prior to 1.8.8 and 2.2.1, crafted JSONata expressions could chain several object-integrity weaknesses to execute arbitrary code.","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.","published":"2026-08-21T21:17:08.000Z","lastModified":"2026-10-12T16:10:00.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":9.3,"severity":"CRITICAL","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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/M"},"cwe":["CWE-94"],"affected":[],"epss":{"score":0.00892,"percentile":0.59164,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.89%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/jsonata-js/jsonata/commit/47c0e58542202c705726663166dbee5fcae47d06","source":"security-advisories@github.com"},{"url":"https://github.com/jsonata-js/jsonata/commit/4b217d514376e30cba278941298d7ba97c4a6c6e","source":"security-advisories@github.com"},{"url":"https://github.com/jsonata-js/jsonata/commit/59e25144fc3b7125f6befd71b8a6e14e1fa610d2","source":"security-advisories@github.com"},{"url":"https://github.com/jsonata-js/jsonata/commit/f09df8416eab8ff44926fc6527c80fb8701de159","source":"security-advisories@github.com"},{"url":"https://github.com/jsonata-js/jsonata/commit/f174348c7fa30f271b63ddedf0767e814004bc4d","source":"security-advisories@github.com"},{"url":"https://github.com/jsonata-js/jsonata/pull/799","source":"security-advisories@github.com"},{"url":"https://github.com/jsonata-js/jsonata/pull/800","source":"security-advisories@github.com"},{"url":"https://github.com/jsonata-js/jsonata/pull/802","source":"security-advisories@github.com"},{"url":"https://github.com/jsonata-js/jsonata/releases/tag/v1.8.8","source":"security-advisories@github.com"},{"url":"https://github.com/jsonata-js/jsonata/releases/tag/v2.2.1","source":"security-advisories@github.com"},{"url":"https://github.com/jsonata-js/jsonata/security/advisories/GHSA-66mm-25pp-rfff","source":"security-advisories@github.com"},{"url":"https://github.com/jsonata-js/jsonata/security/advisories/GHSA-66mm-25pp-rfff","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77415","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}