CVE-2026-30332

State: Published
Severity: 7.5 High
Published: Apr 2, 2026
Updated: Apr 2, 2026
Reserved: Mar 4, 2026

Description

A Time-of-Check to Time-of-Use (TOCTOU) race condition vulnerability in Balena Etcher for Windows prior to v2.1.4 allows attackers to escalate privileges and execute arbitrary code via replacing a legitimate script with a crafted payload during the flashing process.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AC:H/AV:L/A:H/C:H/I:H/PR:L/S:C/UI:R	mitre

Weaknesses

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://github.com/balena-io/etcher/issues/4500
https://www.balena.io/security
https://github.com/B1tBreaker/CVE-2026-30332

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