CVE-2026-27889

Katalog CVE

CVSS 7.5 · High EPSS 0,84%

Kerentanan Integer Overflow or Wraparound pada linuxfoundation nats-server. Skor CVSS 3.1 7.5 (High) menurut github.com.

Deskripsi (NVD)

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Starting in version 2.2.0 and prior to versions 2.11.14 and 2.12.5, a missing sanity check on a WebSockets frame could trigger a server panic in the nats-server. This happens before authentication, and so is exposed to anyone who can connect to the websockets port. Versions 2.11.14 and 2.12.5 contains a fix. A workaround is available. The vulnerability only affects deployments which use WebSockets and which expose the network port to untrusted end-points. If one is able to do so, a defense in depth of restricting either of these will mitigate the attack.

Rincian

Terbit di NVD

25 Maret 2026

Terakhir diubah

9 September 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-190: Integer Overflow or Wraparound
CWE-1286: Improper Validation of Syntactic Correctness of Input

EPSS (30 hari)

0,84% peluang dieksploitasi; lebih tinggi dari 56,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://advisories.nats.io/CVE/secnote-2026-03.txt mitigasi · advisory vendor
• https://github.com/nats-io/nats-server/security/advisories/GHSA-pq2q-rcw4-3hr6 mitigasi · advisory vendor
• https://access.redhat.com/errata/RHSA-2026:21769
• https://access.redhat.com/errata/RHSA-2026:22347
• https://access.redhat.com/errata/RHSA-2026:23345
• https://access.redhat.com/security/cve/CVE-2026-27889
• https://bugzilla.redhat.com/show_bug.cgi?id=2451447
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27889.json