High severity7.5NVD Advisory· Published Jul 8, 2026· Updated Jul 13, 2026
CVE-2026-58250
CVE-2026-58250
Description
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 products
1Patches
Vulnerability mechanics
References
5- github.com/nats-io/nats-server/commit/8dcb26eaea78fdcbe96dbee5986d6019fd5cb94anvdPatch
- github.com/nats-io/nats-server/commit/fc5fe39177533e9dbdd651d2458285bfae1dde27nvdPatch
- github.com/nats-io/nats-server/security/advisories/GHSA-3g5q-cfh2-cq67nvdVendor Advisory
- github.com/nats-io/nats-server/releases/tag/v2.11.17nvdRelease Notes
- github.com/nats-io/nats-server/releases/tag/v2.12.8nvdRelease Notes
News mentions
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