CVE-2026-47389

Katalog CVE

CVSS 8.6 · High EPSS 0,39%

Kerentanan Incomplete List of Disallowed Inputs. Skor CVSS 3.1 8.6 (High) menurut github.com.

Deskripsi (NVD)

Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, when using Ruby versions older than 3.4, PrivateAddressCheck.private_address? returns false for IPv4-mapped IPv6 addresses (::ffff:a.b.c.d) corresponding to some private IPv4 addresses, depending on Ruby version, this can include loopback, RFC1918 private networks, and link-local space. An attacker who controls DNS for any domain can publish an AAAA record with such a mapped address; any outbound HTTP fetch Mastodon performs against that hostname then opens a real TCP connection to the underlying IPv4 address, including 127.0.0.1 and cloud-metadata endpoints such as 169.254.169.254. This vulnerability is fixed in 4.5.10, 4.4.17, and 4.3.23.

Rincian

Terbit di NVD

24 Juni 2026

Terakhir diubah

25 Juni 2026

Status NVD

Deferred

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-184: Incomplete List of Disallowed Inputs
CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-918: Server-Side Request Forgery (SSRF)

EPSS (30 hari)

0,39% peluang dieksploitasi; lebih tinggi dari 31,6% 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/mastodon/mastodon/security/advisories/GHSA-xx55-4rrg-8xg6