CVE-2024-27307 is a critical-severity security vulnerability in jsonata (npm), affecting versions >= 1.4.0, < 1.8.7. It is fixed in 1.8.7, 2.0.4.
Impact In JSONata versions >= 1.4.0, < 1.8.7 and >= 2.0.0, < 2.0.4, a malicious expression can use the transform operator to override properties on the Object constructor and prototype. This may lead to denial of service, remote code execution or other unexpected behavior in applications that evaluate user-provided JSONata expressions. Patch This issue has been fixed in JSONata versions >= 1.8.7 and >= 2.0.4. Applications that evaluate user-provided expressions should update ASAP to prevent exploitation. The following patch can be applied if updating is not possible. References https://github.com/jsonata-js/jsonata/releases/tag/v2.0.4 Credit Thank you to Albert Pedersen of Cloudflare for disclosing this issue.
CVE-2024-27307 has a CVSS score of 9.8 (Critical). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (1.8.7, 2.0.4). Upgrading removes the vulnerable code path.
npm
jsonata (>= 1.4.0, < 1.8.7)jsonata (>= 2.0.0, < 2.0.4)jsonata → 1.8.7 (npm)jsonata → 2.0.4 (npm)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2024-27307 is reachable in your applications. Explore open-source security for your team.
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Already deployed Kodem? See CVE-2024-27307 in your environment →Upgrade the following packages to resolve this vulnerability:
jsonata to 1.8.7 or laterjsonata to 2.0.4 or laterKodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2024-27307 is a critical-severity security vulnerability in jsonata (npm), affecting versions >= 1.4.0, < 1.8.7. It is fixed in 1.8.7, 2.0.4.
CVE-2024-27307 has a CVSS score of 9.8 (Critical). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
jsonata (npm) versions >= 1.4.0, < 1.8.7 is affected.
Yes. CVE-2024-27307 is fixed in 1.8.7, 2.0.4. Upgrade to this version or later.
Whether CVE-2024-27307 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
jsonata to 1.8.7 or laterjsonata to 2.0.4 or later