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NATS is vulnerable to MQTT hijacking via Client ID
NATS is vulnerable to MQTT hijacking via Client ID
Affected packages
- github.com/nats-io/nats-server/v2
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- 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
Structured record: https://osv.dev/vulnerability/GHSA-fcjp-h8cc-6879
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