🛡️ CVE-2026-33218 on Go (Root.io) — nats-server

🟠 CVSS 8.0 — High ✅ No Known Exploit OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2026-33218 in rootio-github.com/nats-io/nats-server/v2 - Patched by Root Root has patched CVE-2026-33218 in the rootio-github.com/nats-io/nats-server/v2 package for Root:Go. Multiple fixed versions available.

Distribution advisory

This page covers CVE-2026-33218 as tracked by Go (Root.io), for the package nats-server. The fix is available in version v2.12.3-aikido.3; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software and timeline

Affected software: github.com/nats-io/nats-server/v2 (fixed in v2.12.3-aikido.3) and rootio-github.com/nats-io/nats-server/v2 (fixed in v2.12.3-root.io.3). Published on 18 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

CVE-2026-33218 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-06-18
Updated 2026-08-12
Modified 2026-06-18
Fix URL N/A

Affected Packages

Software From version Fixed in
github.com/nats-io/nats-server/v2 — v2.12.3-aikido.3
rootio-github.com/nats-io/nats-server/v2 — v2.12.3-root.io.3

References

N/A

Similar Threats

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