GHSA-jxxm-27vp-c3m5
Suggest an improvement- Source
- https://github.com/advisories/GHSA-jxxm-27vp-c3m5
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-jxxm-27vp-c3m5/GHSA-jxxm-27vp-c3m5.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-jxxm-27vp-c3m5
- Aliases
-
- BIT-nats-2026-33217
- CVE-2026-33217
- GO-2026-4834
- Downstream
- Related
- Published
- 2026-03-24T21:44:17Z
- Modified
- 2026-03-27T22:16:27.445993Z
- Severity
-
- 7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N CVSS Calculator
- Summary
- NATS allows MQTT clients to bypass ACL checks
- Details
-
Background
NATS.io is a high performance open source pub-sub distributed communication technology, built for the cloud, on-premise, IoT, and edge computing.
The nats-server provides an MQTT client interface.
Problem Description
When using ACLs on message subjects, these ACLs were not applied in the
$MQTT.>namespace, allowing MQTT clients to bypass ACL checks for MQTT subjects.Affected Versions
Any version before v2.12.6 or v2.11.15
Workarounds
None.
- Database specific
{ "nvd_published_at": "2026-03-25T20:16:32Z", "github_reviewed_at": "2026-03-24T21:44:17Z", "cwe_ids": [ "CWE-863" ], "severity": "HIGH", "github_reviewed": true }- References
Affected packages
Go / github.com/nats-io/nats-server/v2
Package
- Name
- github.com/nats-io/nats-server/v2
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/nats-io/nats-server/v2
Go / github.com/nats-io/nats-server/v2
Package
- Name
- github.com/nats-io/nats-server/v2
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/nats-io/nats-server/v2
Go / github.com/nats-io/nats-server
Package
- Name
- github.com/nats-io/nats-server
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/nats-io/nats-server