CVE-2026-33215

Go/github.com/nats-io/nats-server/v2 CVE-2026-33215: medium 6.5, EPSS 0.29%

NATS is vulnerable to MQTT hijacking via Client ID

Action: Upgrade github.com/nats-io/nats-server/v2 to 2.11.15 or later.

go get github.com/nats-io/nats-server/v2@v2.11.15

go get github.com/nats-io/nats-server/v2@v2.12.6

Affected

Fixed versions

Sources

• osv: GHSA-fcjp-h8cc-6879
• https://github.com/nats-io/nats-server/security/advisories/GHSA-fcjp-h8cc-6879
• https://nvd.nist.gov/vuln/detail/CVE-2026-33215
• https://advisories.nats.io/CVE/secnote-2026-06.tx
• https://github.com/nats-io/nats-server
• https://pkg.go.dev/vuln/GO-2026-4833

CVE-2026-33215 · published 2026-03-24T21:39:52Z · modified 2026-09-10T03:51:00.306717387Z · JSON

Go/github.com/nats-io/nats-server CVE-2026-33215: unknown, EPSS 0.29%

NATS is vulnerable to MQTT hijacking via Client ID in github.com/nats-io/nats-server

Action: No fix published. Pin and monitor.

Affected

Fixed versions

No fixed version in the source.

Sources

• osv: GO-2026-4833
• https://github.com/nats-io/nats-server/security/advisories/GHSA-fcjp-h8cc-6879
• https://nvd.nist.gov/vuln/detail/CVE-2026-33215

CVE-2026-33215 · published 2026-03-26T20:33:05Z · modified 2026-03-27T17:29:30.301970Z · JSON

Go/github.com/nats-io/nats-server/v2 CVE-2026-33215: unknown, EPSS 0.29%

NATS is vulnerable to MQTT hijacking via Client ID in github.com/nats-io/nats-server

Action: Upgrade github.com/nats-io/nats-server/v2 to 2.11.15 or later.

go get github.com/nats-io/nats-server/v2@v2.11.15

go get github.com/nats-io/nats-server/v2@v2.12.6

Affected

Fixed versions

Sources

• osv: GO-2026-4833#Go/github.com/nats-io/nats-server/v2
• https://github.com/nats-io/nats-server/security/advisories/GHSA-fcjp-h8cc-6879
• https://nvd.nist.gov/vuln/detail/CVE-2026-33215

CVE-2026-33215 · published 2026-03-26T20:33:05Z · modified 2026-03-27T17:29:30.301970Z · JSON