CVE-2023-33980

Bramble Synchronisation Protocol (BSP) in Briar before 1.4.22 allows attackers to cause a denial of service (repeated application crashes) via a series of long messages to a contact.

CVE-2023-33983

The Introduction Client in Briar through 1.5.3 does not implement out-of-band verification for the public keys of introducees. An introducer can launch man-in-the-middle attacks against later private communication between two introduced parties.