CVE-2026-27571
4 advisories.
Go/github.com/nats-io/nats-server/v2 CVE-2026-27571: medium 5.9, EPSS 0.82%
nats-server websockets are vulnerable to pre-auth memory DoS
Action: Upgrade github.com/nats-io/nats-server/v2 to 2.11.12 or later.
go get github.com/nats-io/nats-server/v2@v2.11.12go get github.com/nats-io/nats-server/v2@v2.12.3Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.11.12 | - |
| 2.12.0-RC.1 | 2.12.3 | - |
Fixed versions
| 2.11.12 | 2.12.3 |
Sources
- osv: GHSA-qrvq-68c2-7grw
- https://github.com/nats-io/nats-server/security/advisories/GHSA-qrvq-68c2-7grw
- https://nvd.nist.gov/vuln/detail/CVE-2026-27571
- https://github.com/nats-io/nats-server/commit/f77fb7c4535e6727cc1a2899cd8e6bbdd8ba2017
- https://github.com/nats-io/nats-server
- https://github.com/nats-io/nats-server/releases/tag/v2.11.12
- https://github.com/nats-io/nats-server/releases/tag/v2.12.3
- https://pkg.go.dev/vuln/GO-2026-4533
CVE-2026-27571 · published · modified · JSON
Go/github.com/nats-io/nats-server CVE-2026-27571: medium 5.9, EPSS 0.82%
nats-server websockets are vulnerable to pre-auth memory DoS
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | 1.4.1 |
Fixed versions
No fixed version in the source.
Sources
- osv: GHSA-qrvq-68c2-7grw#Go/github.com/nats-io/nats-server
- https://github.com/nats-io/nats-server/security/advisories/GHSA-qrvq-68c2-7grw
- https://nvd.nist.gov/vuln/detail/CVE-2026-27571
- https://github.com/nats-io/nats-server/commit/f77fb7c4535e6727cc1a2899cd8e6bbdd8ba2017
- https://github.com/nats-io/nats-server
- https://github.com/nats-io/nats-server/releases/tag/v2.11.12
- https://github.com/nats-io/nats-server/releases/tag/v2.12.3
- https://pkg.go.dev/vuln/GO-2026-4533
CVE-2026-27571 · published · modified · JSON
Go/github.com/nats-io/nats-server CVE-2026-27571: unknown, EPSS 0.82%
nats-server websockets are vulnerable to pre-auth memory DoS in github.com/nats-io/nats-server
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | - |
Fixed versions
No fixed version in the source.
Sources
- osv: GO-2026-4533
- https://github.com/nats-io/nats-server/security/advisories/GHSA-qrvq-68c2-7grw
- https://github.com/nats-io/nats-server/commit/f77fb7c4535e6727cc1a2899cd8e6bbdd8ba2017
- https://github.com/nats-io/nats-server/releases/tag/v2.11.12
- https://github.com/nats-io/nats-server/releases/tag/v2.12.3
CVE-2026-27571 · published · modified · JSON
Go/github.com/nats-io/nats-server/v2 CVE-2026-27571: unknown, EPSS 0.82%
nats-server websockets are vulnerable to pre-auth memory DoS in github.com/nats-io/nats-server
Action: Upgrade github.com/nats-io/nats-server/v2 to 2.11.12 or later.
go get github.com/nats-io/nats-server/v2@v2.11.12go get github.com/nats-io/nats-server/v2@v2.12.3Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.11.12 | - |
| 2.12.0-RC.1 | 2.12.3 | - |
Fixed versions
| 2.11.12 | 2.12.3 |
Sources
- osv: GO-2026-4533#Go/github.com/nats-io/nats-server/v2
- https://github.com/nats-io/nats-server/security/advisories/GHSA-qrvq-68c2-7grw
- https://github.com/nats-io/nats-server/commit/f77fb7c4535e6727cc1a2899cd8e6bbdd8ba2017
- https://github.com/nats-io/nats-server/releases/tag/v2.11.12
- https://github.com/nats-io/nats-server/releases/tag/v2.12.3
CVE-2026-27571 · published · modified · JSON