What is CVE-2026-29785?

CVE-2026-29785 is a high-severity vulnerability in Nats-io Nats-server, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-03-25.

How severe is CVE-2026-29785?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in Nats-io Nats-server

CVE-2026-29785

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.14 and 2.12.5, if the nats-server has the "leafnode" configuration enabled (not default), then anyone who can connect ca…

EPSS: 0.001 (33.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Nats-io Nats-server — versions < 2.11.14, >= 2.12.0-RC.1, < 2.12.5

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

https://github.com/nats-io/nats-server/security/advisories/GHSA-52jh-2xxh-pwh6 (x_refsource_CONFIRM)
https://github.com/nats-io/nats-server/commit/a1488de6f2ba6e666aef0f9cce0016f7f167d6a8 (x_refsource_MISC)
https://advisories.nats.io/CVE/secnote-2026-04.txt (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-29785?: CVE-2026-29785 is a high-severity vulnerability in Nats-io Nats-server, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-03-25.
How severe is CVE-2026-29785?: High severity. CVSS v3 base score is 7.5 out of 10.