Is CVE-2022-39266 actively exploited?

No active exploitation of CVE-2022-39266 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-39266 be exploited remotely?

Yes. CVE-2022-39266 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-39266?

CVE-2022-39266 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2022-39266

CWE-20Published: September 29, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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.

NVD Source

Risk Analysis

The isolated-vm library for Node.js is vulnerable to sandbox bypass when processing untrusted v8 cached data. Attackers can exploit this to execute arbitrary code within the Node.js process. The critical severity reflects the risk of complete application compromise.

There is no known public exploit, and it is not in the CISA KEV. The vulnerability is remotely exploitable with low attack complexity.

Recommended Action

Update to version 4.3.7 or higher and ensure that untrusted cachedData payloads are not accepted by the API.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2022-39266 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.