Advisory severityCritical9.8Red Hat Linux

Critical [CVE-2026-93606] vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species

This critical-severity Red Hat Linux advisory covers CVE-2026-93606; related products: Red Hat Developer Hub, Self-service automation portal 2.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-93606 Source published Sep 18, 2026Source updated Sep 18, 2026

VulniPulse record published Sep 25, 2026Record updated Sep 28, 2026

CVE-2026-93606

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Summary

vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species. Red Hat rates this critical (CVSS 9.8).

Weakness: CWE-653.

Affected products named by the advisory: Red Hat Developer Hub; Self-service automation portal 2.

Affected versions

3.12.0

Official advisory · high-confidence parse· fetched 8 days ago·verify at source

Fixed versions

3.12.1

Official advisory · high-confidence parse· fetched 8 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Until the fix is applied, do not expose host functions that return host-realm Promise objects to VM/NodeVM. Return only serialized primitives, or keep host work fully outside the sandbox.

Official advisory · high-confidence parse· fetched 8 days ago·verify at source

Discussion(0)

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