GHSA-g8f2-4f4f-5jqw: @nyariv/sandboxjs (CVE-2026-43898)

SandboxJS has a sandbox escape via Function.caller leakage of internal call op

CVSS 10.0 CriticalCriticalEPSS 0.0047 · 41st percentile

Critical, because:

CVSS score 10.0: 9.0 or more.

Published by the GitHub Advisory Database at 11 May 2026, 19:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
@nyariv/sandboxjs	npm	<0.9.6	0.9.6

Identifiers

GHSA-g8f2-4f4f-5jqw · CVE-2026-43898

Weakness (CWE)

CWE-94

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

Score	Rating	CVSS	Vector	Source
10.0	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0047, the 41st percentile, on 14 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 11 May 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.