In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a…
Priority LOW 39CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled, additional DNS requests are issued outside of the proxying extension using the system's DNS settings, resulting in information disclosure. NOTE: this issue exists because of an incomplete fix for CVE-2021-21323 and CVE-2021-22916.
Why it matters now
EPSS 0.0315 88th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:brave:brave:*:*:*:*:*:*:*:* | 1.17.1 – 1.33.106 | Vulnerable | Brave |
| cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Apple |
| cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Linux |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:brave:brave:*:*:*:*:*:*:*:* Versions 1.17.1 – 1.33.106 Vulnerable ·Brave
- cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
- cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-45884
- 2026-10-03 Alias added: GHSA-7q5w-r799-frgq
References
More Brave vulnerabilities
- TI-2022-23748 Brave Browser before 1.43.88 allowed a remote attacker to cause a denial of service in… CVSS 3.1MEDIUM 6.5
- TI-2022-23747 Brave Browser before 1.42.51 allowed a remote attacker to cause a denial of service via a… CVSS 3.1MEDIUM 6.5
- TI-2017-05997 Brave 0.12.4 has a Status Bar Obfuscation issue in which a redirection target is shown in… CVSS 3.1MEDIUM 5.3
- TI-2021-05777 Information disclosure in https://github.com/brave/brave-core CVSS 3.1MEDIUM 5.9
- TI-2022-23746 Brave Browser before 1.43.34 allowed a remote attacker to cause a denial of service via a… CVSS 3.1MEDIUM 6.5
- TI-2017-05996 Brave 0.12.4 has a URI Obfuscation issue in which a string such as… CVSS 3.0MEDIUM 6.5
Sources
- CVE-2021-45884 · CVE Program
- CVE-2021-45884 · NVD
- FIRST EPSS
- GHSA-7q5w-r799-frgq · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences