CVE•Published 2026-03-25•Modified 2026-06-30•0 articles on news•5 live references•NVD data
CVE-2026-33217Linuxfoundation · Nats-server
Vulnerability data via NVD (ingested)
CVSS v3.1
7.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
EPSS percentile
—
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, 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. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.
Timeline
Published 2026-03-25
Modified 2026-06-30
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-33217Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Linuxfoundation Nats-server"All exposed Linuxfoundation Nats-server instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Nats-server"HTTP body or banner mentions "Nats-server" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-33217Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-33217Censys host search filtered to this CVE id.
grep.app
CVE-2026-33217Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-33217GitHub code search for direct mentions.
Google dork
"CVE-2026-33217" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-33217 on GitHub.
We haven't classified any articles referencing CVE-2026-33217 yet. The external references above still apply.