CVE-2026-46349
Mastodon: LD-Signature Bypass via JSON-LD Named-Graph Restructuring
5.3
MEDIUM
CVSS 3.1
EPSS 0.16%
描述
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, Mastodon's normalization of incoming activities signed with Linked-Data Signatures does not sufficiently protect the activities from a certain class of spoofing, allowing attackers to re-arrange a valid signed JSON-LD activity from a third-party actor to have it processed differently. This vulnerability is fixed in 4.5.10, 4.4.17, and 4.3.23.
如何修補 CVE-2026-46349
要修補 CVE-2026-46349,請將受影響套件升級到下列已修補版本。
- —升級至 4.5.10 或更新版本
CVE-2026-46349 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)
- >= 4.5.0, < 4.5.10
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |