CVE-2026-78654

cleverbrush framework/deep deepExtend.ts deepExtend prototype pollution

HIGH
7.3
CVSS Score
Published: August 25, 2026 at 06:00 AM UTC
Updated: September 28, 2026 at 11:10 PM UTC
2 products affected across 1 vendorFrameworkDeep

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Severity
HIGH7.3
Exploit prediction
EPSS 0.7%
SSVC
PoC

Description

A vulnerability has been found in cleverbrush framework and deep up to 4.4.0. This impacts the function deepExtend of the file libs/deep/src/deepExtend.ts. The manipulation leads to improperly controlled modification of object prototype attributes. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. Upgrading to version 4.4.1 will fix this issue. The identifier of the patch is 810398c1308c500c3b8b6af380b5a89371389327. You should upgrade the affected component.

Affected

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

Vendor states this is fixed in 4.4.1 (unaffected)
Vendor states this is fixed in 4.4.1 (unaffected)

References (9)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/394866
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/394866/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-78654
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/886401
ExploitIssue Tracking
Source: cverecord
https://github.com/cleverbrush/framework/issues/213
Issue TrackingPatch
Source: cverecord
https://github.com/cleverbrush/framework/pull/215

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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