Vulnerability in ByteDance Coze Scraper Extension Affects External Message Handler
CVE-2026-96680

5.3MEDIUM

Key Information:

Vendor

Bytedance

Status
Coze Scraper Extension
Vendor
CVE Published:
23 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-96680?

A significant vulnerability exists in the ByteDance Coze Scraper Extension up to version 2.0.2, specifically within the external message handler's function chrome.runtime.onMessageExternal.addListener. This weakness allows an attacker to manipulate URL parameters, leading to unauthorized access due to insufficient authentication measures. The potential for remote exploitation is high, as the attack can be executed from a distance. The vendor has been notified of this issue but has not provided any response regarding a fix or mitigation.

Affected Version(s)

Coze Scraper Extension 2.0.0

Coze Scraper Extension 2.0.1

Coze Scraper Extension 2.0.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-96680 - Proof of Concept

References

https://vuldb.com/vuln/409003
vdb-entrytechnical-description
https://vuldb.com/vuln/409003/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-96680
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

DRXYJ-01 (VulDB User)
VulDB CNA Team
.