🛡️ CVE-2026-33219 on Go (Root.io) — nats-server

🟡 CVSS 5.0 — Medium ✅ No Known Exploit OSV

5.0

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

CVE-2026-33219 in rootio-github.com/nats-io/nats-server/v2 - Patched by Root

Root has patched CVE-2026-33219 in the rootio-github.com/nats-io/nats-server/v2 package for Root:Go. Multiple fixed versions available.

Distribution advisory

This page covers CVE-2026-33219 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 low.

Weakness class

ROOT-APP-GOBINARY-CVE-2026-33219 is classified as CWE-770: Allocation of Resources Without Limits. Resources are allocated on request with no cap, so a client can exhaust them.

Affected software

ROOT-APP-GOBINARY-CVE-2026-33219 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-2026-33219 on other distributions

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

Base record Debian Ubuntu

Details

Severity MEDIUM

CVSS Score 5.0

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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

🔗 NVD 🔗 Mitre

Similar Threats

Vulnerability Monitoring

Track new vulnerabilities in nats-server

ROOT-APP-GOBINARY-CVE-2026-33219 is rated CVSS 5.0 Medium. BotEraser monitors your WordPress installation and notifies you when software you use appears in our vulnerability database.

Set Up Free Alerts →

No credit card required · Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.