CVE-2026-58250
published 2026-07-08CVE-2026-58250: NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with…
PriorityP350high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.74%
52.1th percentile
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed in versions 2.12.8 and 2.11.17.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linuxfoundation | nats-server | < 2.11.17 | 2.11.17 |
| linuxfoundation | nats-server | >= 2.12.0 < 2.12.8 | 2.12.8 |
| nats-io | nats-server | < 2.11.17 | 2.11.17 |
| nats-io | nats-server | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_redhat7.5HIGH
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Bugzilla
CVE-2026-58250 golang-github-nats-io-streaming-server: NATS Server: Denial of Service via repeated leafnode INFO messages during pre-authentication [fedora-all]
bugzilla·2026-07-09·CVSS 7.5
CVE-2026-58250 [HIGH] CVE-2026-58250 golang-github-nats-io-streaming-server: NATS Server: Denial of Service via repeated leafnode INFO messages during pre-authentication [fedora-all]
CVE-2026-58250 golang-github-nats-io-streaming-server: NATS Server: Denial of Service via repeated leafnode INFO messages during pre-authentication [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed
Bugzilla
CVE-2026-58250 github.com/nats-io/nats-server: NATS Server: Denial of Service via repeated leafnode INFO messages during pre-authentication
bugzilla·2026-07-08·CVSS 7.5
CVE-2026-58250 [HIGH] CVE-2026-58250 github.com/nats-io/nats-server: NATS Server: Denial of Service via repeated leafnode INFO messages during pre-authentication
CVE-2026-58250 github.com/nats-io/nats-server: NATS Server: Denial of Service via repeated leafnode INFO messages during pre-authentication
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed in versions 2.12.8 and 2.11.17.
https://github.com/nats-io/nats-server/commit/8dcb26eaea78fdcbe96dbee5986d6019fd5cb94ahttps://github.com/nats-io/nats-server/commit/fc5fe39177533e9dbdd651d2458285bfae1dde27https://github.com/nats-io/nats-server/releases/tag/v2.11.17https://github.com/nats-io/nats-server/releases/tag/v2.12.8https://github.com/nats-io/nats-server/security/advisories/GHSA-3g5q-cfh2-cq67
2026-07-08
Published