🛡️ CVE-2026-33217 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-2026-33217 in rootio-github.com/nats-io/nats-server/v2 - Patched by Root

Root has patched CVE-2026-33217 in the rootio-github.com/nats-io/nats-server/v2 package for Root:Go. Multiple fixed versions available.

Distribution advisory

This page covers CVE-2026-33217 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 low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity high, availability none.

Affected software

ROOT-APP-GOBINARY-CVE-2026-33217 is recorded against 2 packages.

  • github.com/nats-io/nats-server/v2 (fixed in v2.12.3-aikido.3)
  • rootio-github.com/nats-io/nats-server/v2 (fixed in v2.12.3-root.io.3)

Timeline and source

Published on 18 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

CVE-2026-33217 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:L/UI:N/S:U/C:L/I:H/A:N
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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