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CVE-2026-33222

NATS JetStream has an authorization bypass through its Management API

Published: Mar 25, 2026Updated: Mar 26, 2026 Sources: CVE List NVDCWE-285
NVD MITRE
4.9CVSSMEDIUM
EPSS Score
0.3%
Top 79.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

Description

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, users with JetStream admin API access to restore one stream could restore to other stream names, impacting data which should have been protected against them. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, if developers have configured users to have limited JetStream restore permissions, temporarily remove those permissions.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-285

Affected Products

nats-serverlinuxfoundation
Mixed
AI / ML / ml-framework
nats-servernats-io
On-prem
Databases / cache-message-queue
linuxfoundationoss-projectUSAI / MLaka yocto, pytorch, everest
nats-iooss-projectDatabases

Exploitability

Workaround Available

References

https://advisories.nats.io/CVE/secnote-2026-12.txt
advisories.nats.io
https://github.com/nats-io/nats-server/security/advisories/GHSA-9983-vrx2-fg9c
github.com

Timeline

Published
Mar 25, 2026
Last Updated
Mar 26, 2026

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