CVE-2026-6594: Brikcss Merge

High severity, CVSS 7.3. EPSS: 0.6% chance of exploitation in the next 30 days.

A vulnerability was determined in brikcss merge up to 1.3.0. This affects an unknown part. Executing a manipulation of the argument __proto__/constructor.prototype/prototype can lead to improperly controlled modification of object prototype attributes. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• Brikcss Merge: version 1.0 only; version 1.1 only; version 1.2 only; version 1.3.0 only

Published 2026-04-20. Last modified 2026-06-17.