CVE-2026-63573

A Bleichenbacher-style adaptive chosen-ciphertext attack exists in Legion of the Bouncy Castle Inc. bc-csharp versions before 2.7.0 . The vulnerability is located in the CMS RSA PKCS#1 v1.5 key-transport unwrap (KeyTransRecipientInformation.UnwrapKey) component. Because the system rejects ciphert...

CVE-2026-40300: Improper Access Control

Zulip is an open-source team collaboration tool. Prior to 12.0, With messageedithistoryvisibilitypolicy set to "moves", /api/v1/messages/id/history still returns historical content values, allowing low-privilege users to recover text that was edited away from other users' messages. This...