Incorrect Authorization Affecting github.com/nats-io/nats-server/v2/server package, versions <2.14.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published9 Jul 2026
- disclosed8 Jul 2026
- creditkodareef5
Introduced: 8 Jul 2026
CVE-2026-58254 Â (opens in a new tab)How to fix?
Upgrade github.com/nats-io/nats-server/v2/server to version 2.14.3 or higher.
Overview
github.com/nats-io/nats-server/v2/server is an A simple, secure and performant communications system for digital systems, services and devices.
Affected versions of this package are vulnerable to Incorrect Authorization due to insufficient enforcement of destination permission checks for messages arriving through leafnode connections. An attacker can send unauthorized trace events to restricted subjects and disrupt normal message delivery or storage by exploiting this permission bypass.