CVE-2026-22245
Mastodon has SSRF Protection bypass
描述
Mastodon is a free, open-source social network server based on ActivityPub. By nature, Mastodon performs a lot of outbound requests to user-provided domains. Mastodon, however, has some protection mechanism to disallow requests to local IP addresses (unless specified in `ALLOWED_PRIVATE_ADDRESSES`) to avoid the "confused deputy" problem. The list of disallowed IP address ranges was lacking some IP address ranges that can be used to reach local IP addresses. An attacker can use an IP address in the affected ranges to make Mastodon perform HTTP requests against loopback or local network hosts, potentially allowing access to otherwise private resources and services. This is fixed in Mastodon v4.5.4, v4.4.11, v4.3.17 and v4.2.29.
如何修補 CVE-2026-22245
要修補 CVE-2026-22245,請將受影響套件升級到下列已修補版本。
- —升級至 4.2.29 或更新版本
CVE-2026-22245 正在被利用嗎?
低 — EPSS 為 0.2%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 4.2.29, >= 4.3.0, < 4.3.17, >= 4.4.0, < 4.4.11, >= 4.5.0, < 4.5.4
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
參考連結(5)
- WEBgithub.com/mastodon/mastodon/commit/0f4e8a6240b5af1f2c3f34d2793d8610c6ef2aca
- WEBgithub.com/mastodon/mastodon/commit/17022907866710a72a1b1fc0a5ce9538bad1b4c3
- WEBgithub.com/mastodon/mastodon/commit/71ae4cf2cf5138ccdda64b1b1d665849b688686d
- WEBgithub.com/mastodon/mastodon/security/advisories/GHSA-xfrj-c749-jxxq