PatchTheCVECVE-2022-39266: isolated-vm is a library for nodejs which gives the user access to v8's Isolate interface
CVE-2022-39266 is a critical-severity flaw (CVSS 9.6) affecting isolated-vm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
isolated-vm is a library for nodejs which gives the user access to v8's Isolate interface. In versions 4.3.6 and prior, if the untrusted v8 cached data is passed to the API through CachedDataOptions, attackers can bypass the sandbox and run arbitrary code in the nodejs process. Version 4.3.7 changes the documentation to warn users that they should not accept `cachedData` payloads from a user.
Why this priority
- Critical severity
A fixed release or distro patch exists.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2022-39266?
isolated-vm: upgrade to newer than 4.3.6. Exact commands for each OS are on this page.
Is CVE-2022-39266 being exploited?
CVE-2022-39266 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2022-39266 affect?
CVE-2022-39266 affects isolated-vm. Severity is critical (CVSS 9.6). isolated-vm is a library for nodejs which gives the user access to v8's Isolate interface. In versions 4.3.6 and prior, if the untrusted v8 cached data is passed to the API through CachedDataOptions, attackers can bypass the sandbox and run
How urgent is CVE-2022-39266?
Priority 51/100. Critical severity
Software pages
Related CVEs
- CVE-2021-21413 HIGH 8.0 UPGRADE isolated-vm is a library for nodejs which gives you access to v8's Isolate interface