Security Advisory

CVE-2026-42462

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-10 20:22:35

Last updated 2026-06-11 13:34:03

Assigner GitHub_M

CVSS score 7.0

State PUBLISHED

Description

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to versions 1.9.11, 1.10.10, 2.0.18, 2.1.14, and 2.2.3, an attacker can make use of JSON-LD features to restructure a JSON-LD document that would change how Fedify interprets it without changing its Linked Data Signature, allowing them to alter a third-party signed activity they have received. Versions 1.9.11, 1.10.10, 2.0.18, 2.1.14, and 2.2.3 fix the issue.

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