NATS Server: Incomplete Stripping of Nats-Request-Info Header Allows Identity Spoofing
Summary
NATS Server: Incomplete Stripping of Nats-Request-Info Header Allows Identity Spoofing
Original description
The description as published by the source.
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: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-33223 nats-server
- Ubuntu UBUNTU-CVE-2026-33223 nats-server
References
- advisory advisories.nats.io
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com