Brave: Cross-site scripting
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Brave Brave brave-popup-builder allows Code Injection.This issue affects Brave: from n/a through 0.8.8. The CNA vector indicates that no prior authentication is required. The export does not disclose the endpoint, input parameter, vulnerable function or detailed input-processing path. No additional exploit mechanics are inferred. Injected script executes in a victim browser when the affected output is rendered; the required viewer role is not disclosed. The vector marks UI:N, but the narrative’s victim viewing or interaction requirement still applies. The structured affected range is <= 0.8.8.
- Component
- Brave
- Plugin slug
brave-popup-builder- Affected
- <= 0.8.8
- Safe version
0.8.9- Published
- Oct 29, 2026
This CVE was published Oct 29, 2026 and is one of 6 known issues for this plugin.
Update, patch or deactivate.
Update to a supported release containing the confirmed fix: 0.8.9. Validate input and escape values for their final HTML, attribute or JavaScript context; review affected stored content where applicable.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Brave Brave brave-popup-builder allows Code Injection.This issue affects Brave: from n/a through 0.8.8.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N