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brave-browser

In Brave Browser Desktop versions prior to 1.83.10 that have the split view feature enabled, the "Open Link in Split View" context menu item did not respect the SameSite cookie attribute. Therefore SameSite=Strict cookies would be sent on a cross-site navigation using this method.

CVE-2025-48980 is a vulnerability identified in the Brave Desktop Browser versions prior to 1.83.10, specifically affecting the split view feature. The vulnerability arises because the "Open Link in Split View" context menu option does not properly enforce the SameSite cookie attribute, particularly SameSite=Strict. Normally, the SameSite=Strict attribute prevents cookies from being sent on cross-site requests, thereby mitigating cross-site request forgery (CSRF) and cross-site leakage risks. However, in this case, when a user opens a link in split view, the browser incorrectly sends SameSite=Strict cookies along with the cross-site navigation request. This behavior violates the intended security model of the SameSite attribute, potentially allowing malicious sites or actors to gain access to sensitive cookie data that should have been restricted. The vulnerability does not affect cookie integrity or availability but compromises confidentiality by leaking cookies that may contain authentication tokens or session identifiers. Exploitation requires user interaction (opening a link in split view) but no prior authentication or elevated privileges. The vulnerability is tracked under CWE-565 (Reliance on Cookies without Validation and Integrity Checking). Although no exploits are currently known in the wild, the medium CVSS score of 6.5 reflects the moderate risk posed by this issue. The flaw is particularly relevant for users and organizations that rely on Brave Browser's privacy features and handle sensitive or personal data.

Detailed information about CVE-2025-48980: Vulnerability in Brave Desktop Browser affecting Brave Desktop Browser. Get real-time updates, technical details, and

CVE-2025-48980: Vulnerability in Brave Desktop Browser - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-48980: Vulnerability in Brave Desktop Browser

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