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Vulnerability record · CVE-2017-18256 · published 4 April 2018

CVE-2017-18256: Brave browser vulnerability

Brave · Brave Browser

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.

6.5 CVSS 3.0 Medium EPSS 4.8% · top 8.3%
6.5CVSS 3.0 base score, v2 4.3
4.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://hackerone.com/reports/176066 ExploitThird Party Advisory
https://www.exploit-db.com/exploits/44474/ ExploitThird Party AdvisoryVDB Entry
https://hackerone.com/reports/176066 ExploitThird Party Advisory
https://www.exploit-db.com/exploits/44474/ ExploitThird Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2016-10718Brave browser improper input validation vulnerabilityBrave Browser before 0.13.0 allows a tab to close itself even if the tab was not opened by a script, resulting in denial of service.EPSS 12%

Source: NIST National Vulnerability Database (record CVE-2017-18256), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.