Go/github.com/nats-io/nats-server/v2 CVE-2026-27889: high 7.5, EPSS 0.59%
NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead
Action: Upgrade github.com/nats-io/nats-server/v2 to 2.11.14 or later.
go get github.com/nats-io/nats-server/v2@v2.11.14go get github.com/nats-io/nats-server/v2@v2.12.5Affected
| introduced | fixed | last affected |
|---|---|---|
| 2.2.0 | 2.11.14 | - |
| 2.12.0 | 2.12.5 | - |
Fixed versions
| 2.11.14 | 2.12.5 |
Sources
- osv: GHSA-pq2q-rcw4-3hr6
- https://github.com/nats-io/nats-server/security/advisories/GHSA-pq2q-rcw4-3hr6
- https://nvd.nist.gov/vuln/detail/CVE-2026-27889
- https://advisories.nats.io/CVE/secnote-2026-03.txt
- https://github.com/nats-io/nats-server
CVE-2026-27889 · published · modified · JSON