CVE-2026-78654: Improperly Controlled Modification of Object Prototype Attributes in cleverbrush framework
Description
CVE-2026-78654 is a medium severity vulnerability in the cleverbrush framework up to version 4.4.0. It affects the deepExtend function in the libs/deep/src/deepExtend.ts file, allowing improper modification of object prototype attributes. This flaw can be exploited remotely without authentication. The issue is fixed in version 4.4.1.
CVSS v4.0
Score 6.9medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The cleverbrush framework versions before 4.4.1 contain a vulnerability in the deepExtend function that allows attackers to improperly modify object prototype attributes. This vulnerability is identified as CVE-2026-78654 and is related to CWE-94 (Improper Control of Generation of Code) and CWE-1321 (Improper Modification of Object Prototype Attributes). Remote exploitation is possible without privileges or user interaction. The vulnerability has a CVSS 3.1 base score of 6.9, indicating medium severity. The issue is resolved by upgrading to version 4.4.1, with the patch identified by commit 810398c1308c500c3b8b6af380b5a89371389327.
Potential Impact
An attacker can remotely exploit this vulnerability to improperly modify object prototype attributes in the cleverbrush framework, potentially leading to unexpected behavior or security issues in applications using the affected versions. The vulnerability does not require privileges or user interaction but has limited impact scope and complexity as reflected by the medium CVSS score.
Mitigation Recommendations
Upgrade the cleverbrush framework to version 4.4.1 or later. This version contains an official fix for the vulnerability. No other mitigation is required as the patch fully addresses the issue.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-85f3-5c6p-wf9v
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-78654"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8d9ae9acd9273b493e17f1
Added to database: 08/25/2026, 13:38:49 UTC
Last enriched: 09/29/2026, 05:20:18 UTC
Last updated: 10/09/2026, 06:48:19 UTC
Views: 58
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