CVE-2026-45123

Katalog CVE

CVSS 4.3 · Medium EPSS 0,37%

Kerentanan Server-Side Request Forgery (SSRF). Skor CVSS 3.1 4.3 (Medium) menurut github.com.

Deskripsi (NVD)

MyBB is free and open source forum software. Prior to 1.8.40, the remote requests feature does not correctly handle IPv6 addresses, resulting in a server-side request forgery vulnerability. The default disallowed remote hosts list does not include IPv6 addresses. Verification in fetch_remote_file() fails open when get_ip_by_hostname() returns no result because that function does not return IPv6 results, allowing a crafted remote target to bypass the host restriction. The uniquely identifying implementation details include fail-open verification, and inc/functions.php. This issue is fixed in version 1.8.40.

Rincian

Terbit di NVD

18 Agustus 2026

Terakhir diubah

8 September 2026

Status NVD

Deferred

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-918: Server-Side Request Forgery (SSRF)

EPSS (30 hari)

0,37% peluang dieksploitasi; lebih tinggi dari 28,7% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/mybb/mybb/commit/9cdadbf66f4cef50019f13aaa8e3470ea6535cb7
• https://github.com/mybb/mybb/releases/tag/mybb_1840
• https://github.com/mybb/mybb/security/advisories/GHSA-56wr-64wx-5g7j
• https://mybb.com/versions/1.8.40