CVE-2026-77414
JSONata flaw allows crafted expressions to achieve remote code execution.
Is CVE-2026-77414 being exploited?
Not confirmed. CVE-2026-77414 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.43% probability of exploitation in the next 30 days.
How severe is CVE-2026-77414?
CVE-2026-77414 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-77414?
Yes. A fix has been recorded for CVE-2026-77414. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-77414 affect?
CVE-2026-77414 affects JSONata <1.8.8 / <2.2.1, Node.js and server-side apps using JSONata, Services that evaluate untrusted JSONata expressions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-77414?
Upgrade to JSONata 1.8.8 / 2.2.1+, block/untrusted expressions, audit deps and inputs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution in host process via crafted JSONata expressions that invoke child_process through prototype access.
Immediate action required
- affected< 1.8.8
- affected>= 2.0.0 and < 2.2.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.