GO-2026-4841
NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead in github.com/nats-io/nats-server
At a glance
- Published
- Updated
- CVE
- CVE-2026-27889
- Aliases
- BIT-nats-2026-27889, GHSA-pq2q-rcw4-3hr6
Description
NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead in github.com/nats-io/nats-server
Affected packages
| Package | Versions |
|---|---|
| Go · github.com/nats-io/nats-server | introduced 0 |
| Go · github.com/nats-io/nats-server/v2 | introduced 2.2.0, fixed 2.11.14, introduced 2.12.0, fixed 2.12.5 |
References
- https://github.com/nats-io/nats-server/security/advisories/GHSA-pq2q-rcw4-3hr6 ADVISORY
- https://advisories.nats.io/CVE/secnote-2026-03.txt WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — Go Vulnerability Database |