CVE-2017-18256
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.
Does this matter?
A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 4.8%. Treat it as high on anything reachable from the internet.
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
- 6.5 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 4.84% probability · 92th percentile
- Public exploits
- 1 in Exploit-DB · first 17 April 2018
- CISA KEV
- Not listed
- Affected
- brave/brave browser
- Source
- cve@mitre.org
EPSS 4.8% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- https://hackerone.com/reports/176066Exploit, Third Party Advisory
- https://www.exploit-db.com/exploits/44474/Exploit, Third Party Advisory, VDB Entry
- https://hackerone.com/reports/176066Exploit, Third Party Advisory
- https://www.exploit-db.com/exploits/44474/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.