CVE-2026-6594
High
Description
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.
SeverityHigh
CVSS7.3
Exploit probability—
Product@brikcss/merge
PublishedApr 20, 2026
First seenApr 20, 2026
Weakness typeCWE-1321Prototype pollutionCWE-94Code injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @brikcss/mergenpm | v ≤ 1.3.1 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.