NATS is vulnerable to MQTT hijacking via Client ID

Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-33215 · CVE overview and exploitation status

EUVD-2026-15017

GHSA-fcjp-h8cc-6879

BIT-nats-2026-33215

GO-2026-4833

cve-program · CVE-2026-33215

• https://github.com/nats-io/nats-server/security/advisories/GHSA-fcjp-h8cc-6879
• https://advisories.nats.io/CVE/secnote-2026-06.tx

euvd · EUVD-2026-15017

• https://github.com/nats-io/nats-server/security/advisories/GHSA-fcjp-h8cc-6879
• https://advisories.nats.io/CVE/secnote-2026-06.tx

nvd · CVE-2026-33215

• https://advisories.nats.io/CVE/secnote-2026-06.tx
• https://github.com/nats-io/nats-server/security/advisories/GHSA-fcjp-h8cc-6879

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

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

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