Integer overflow in Nats-io Nats-server
CVE-2026-58207
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, a client able to send account-scoped connection monitoring requests could crash the server by supplying Connz pa…
Vulnerability class: Integer Overflow
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Nats-io Nats-server — versions < 2.12.12, >= 2.14.0-RC.1, < 2.14.3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-58207?
- CVE-2026-58207 is a high-severity vulnerability in Nats-io Nats-server, classified under Integer Overflow or Wraparound. CVSS score: 7.7/10. Published 2026-07-08.
- How severe is CVE-2026-58207?
- High severity. CVSS v3 base score is 7.7 out of 10.