GHSA-33r5-xmm8-v6x5: @enspirit/elo (CVE-2026-44267)

Elo JavaScript emitter has sandbox escape to arbitrary Node.js / browser code execution via unfiltered `.constructor` member access

CVSS 9.8 CriticalCriticalEPSS 0.0083 · 57th percentile

Critical, because:

CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 3 Nov 2026, 17:53 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
@enspirit/elo	npm	<1.0.1	1.0.1

Identifiers

GHSA-33r5-xmm8-v6x5 · CVE-2026-44267

Weakness (CWE)

CWE-79 · CWE-94 · CWE-693 · CWE-1336

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
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0083, the 57th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

3 Nov 2026, 17:52 UTC Confirmed by the CVE List
3 Nov 2026, 17:53 UTC Confirmed by GitHub Advisory Database
3 Nov 2026, 17:55 UTC First seen by agentprime
3 Nov 2026, 18:02 UTC Confirmed by OSV
3 Nov 2026, 18:18 UTC Confirmed by NVD

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.