CVE-2026-33223 — NATS Server: Incomplete Stripping of Nats-Request-Info Header Allows Identity Spoofing
NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, the NATS message header `Nats-Request-Info:…
Published: 2026-03-25 · CVSS: 6.4 · CVSS 3.1
NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, the NATS message header `Nats-Request-Info:` is supposed to be a guarantee of identity by the NATS server, but the stripping of this header from inbound messages was not fully effective. An attacker with valid credentials for any regular client interface could thus spoof their identity to services which rely upon this header. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7