Bug 2451479 (CVE-2026-33223) - CVE-2026-33223 nats-server: github.com/nats-io/nats-server: NATS-Server: Identity spoofing via `Nats-Request-Info:` header
Summary: CVE-2026-33223 nats-server: github.com/nats-io/nats-server: NATS-Server: Iden...
Keywords:
Status: NEW
Alias: CVE-2026-33223
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2451503
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-25 21:01 UTC by OSIDB Bzimport
Modified: 2026-03-25 21:29 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-03-25 21:01:52 UTC 
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.
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