CVE-2019-13126

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-07-29 · updated 2026-06-17
Weakness: CWE-190

Description

An integer overflow in NATS Server before 2.0.2 allows a remote attacker to crash the server by sending a crafted request. If authentication is enabled, then the remote attacker must have first authenticated.

Affected products

nats-io nats-server: before 2.0.2 — fixed in 2.0.2

How to fix

Upgrade to a fixed version: nats-io nats-server 2.0.2. Check the vendor advisory for mitigations.

References

https://github.com/nats-io/nats-server/pull/1053
https://www.twistlock.com/labs-blog/finding-dos-vulnerability-nats-go-fuzz-cve-2019-13126/
https://github.com/nats-io/nats-server/pull/1053
https://www.twistlock.com/labs-blog/finding-dos-vulnerability-nats-go-fuzz-cve-2019-13126/

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