Drop everything.

Critical CVEs that are confirmed exploited or very likely to be. Newest first.

Flaw: Crypto
Affects: Server

1 CVEs · updated 2026-11-12 17:53 UTC

CVE-2021-22160
If Apache Pulsar is configured to authenticate clients using tokens based on JSON Web Tokens (JWT), the signature of the token is not validated if the algorithm of the presented token is set to "none". This allows an attacker to connect to Pulsar instances as any user (incl. admins).

Drop everything Crypto Server Apache Pulsar

9.8 CRITICAL 53% exploit odds Fix listed 2021-05-26 13:15 UTC

A CVE is listed as major when it is critical (CVSS 9.0 or higher) and either confirmed exploited in the wild with a real chance of more, or very likely to be exploited (EPSS 40% or more).