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Advisory record · GHSA-66mm-25pp-rfff

JSONata vulnerable to Arbitrary Code Execution via crafted JSONata expressions

CVSS 9.3 CriticalCriticalEPSS 0.0089 · 59th percentile

Critical, because:

  • CVSS score 9.3: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 21 Aug 2026, 21:04 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
jsonatanpm>=2.0.0, <2.2.1 || <1.8.82.2.1, 1.8.8
Identifiers
GHSA-66mm-25pp-rfff · CVE-2026-77415
Weakness (CWE)
CWE-94
Tags
Published
21 Aug 2026
Updated
21 Aug 2026

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.3 Critical 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0089, the 59th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 21 Aug 2026. New records show when each source confirmed them.

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.