CVE-2026-33248

Katalog CVE

CVSS 4.2 · Medium EPSS 0,17%

Kerentanan Improper Authentication pada linuxfoundation nats-server. Skor CVSS 3.1 4.2 (Medium) menurut github.com.

Deskripsi (NVD)

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using mTLS for client identity, with `verify_and_map` to derive a NATS identity from the client certificate's Subject DN, certain patterns of RDN would not be correctly enforced, allowing for authentication bypass. This does require a valid certificate from a CA already trusted for client certificates, and `DN` naming patterns which the NATS maintainers consider highly unlikely. So this is an unlikely attack. Nonetheless, administrators who have been very sophisticated in their `DN` construction patterns might conceivably be impacted. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, developers should review their CA issuing practices.

Rincian

Terbit di NVD

25 Maret 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

4.2 (Medium), sumber github.com
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-287: Improper Authentication
CWE-295: Improper Certificate Validation

EPSS (30 hari)

0,17% peluang dieksploitasi; lebih tinggi dari 5,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://advisories.nats.io/CVE/secnote-2026-13.txt advisory vendor
• https://github.com/nats-io/nats-server/security/advisories/GHSA-3f24-pcvm-5jqc advisory vendor