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CVE-2026-6594

brikcss merge prototype pollution

HIGH
7.3
CVSS Score
Published: April 20, 2026 at 01:45 AM UTC
Updated: October 26, 2026 at 09:10 PM UTC
1 product affected across 1 vendorMerge

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Severity
HIGH7.3
Exploit prediction
EPSS 0.3%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/358229
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/358229/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/791805
Exploit
Source: cverecord
https://github.com/sudo-secure/security-research/blob/main/brikcss-merge/prototype-pollution/PoC.md

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-1321CWE-94

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