What’s Vulnerable › Vulnerabilities

CVE-2017-18256

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-04-04 · updated 2026-06-17

Description

Brave Browser before 0.13.0 allows remote attackers to cause a denial of service (resource consumption) via a long alert() argument in JavaScript code, because window dialogs are mishandled.

Affected products

• Brave Browser: before 0.13.0 — fixed in 0.13.0

How to fix

Upgrade to a fixed version: Brave Browser 0.13.0. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/176066
• https://www.exploit-db.com/exploits/44474/
• https://hackerone.com/reports/176066
• https://www.exploit-db.com/exploits/44474/

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