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CVE PROGRAM SOURCE RECORD7.0 High

CVE-2026-42462

Fedify has an LD-Signature Bypass via JSON-LD Named-Graph Restructuring

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

fedify-dev fedify

  • >= 2.2.0, < 2.2.3affected
  • >= 2.1.0, < 2.1.14affected
  • >= 2.0.0, < 2.0.18affected
  • >= 1.10.0, < 1.10.10affected
  • < 1.9.11affected

References