What’s Vulnerable › Vulnerabilities

CVE-2026-78654: cleverbrush framework/deep deepExtend.ts deepExtend prototype pollution

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-25 · updated 2026-09-28
• Weakness: CWE-94

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 products

• cleverbrush deep: 4.0, 4.1, 4.2, 4.3, 4.4.0
• cleverbrush framework: 4.0, 4.1, 4.2, 4.3, 4.4.0

References

• https://github.com/cleverbrush/framework/
• https://github.com/cleverbrush/framework/commit/810398c1308c500c3b8b6af380b5a89371389327
• https://github.com/cleverbrush/framework/issues/213
• https://github.com/cleverbrush/framework/pull/215
• https://github.com/cleverbrush/framework/releases/tag/%40cleverbrush/async%404.4.1
• https://vuldb.com/cve/CVE-2026-78654
• https://vuldb.com/submit/886401
• https://vuldb.com/vuln/394866
• https://vuldb.com/vuln/394866/cti
• https://vuldb.com/submit/886401

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