CVE-2026-42462

HIGH EPSS 6.7%
Published Jun 10, 20263w ago · Modified Jun 17, 20262w ago
7.0 CVSS 3.1
High
Find Similar
Published Jun 10, 2026 3w ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.0
Exploitability
2.2
Impact
4.7
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity High
Availability Low

Threat Intelligence

EPSS Exploit Probability
6.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 4

CWE-1289
CWE-180
CWE-347
CWE-436

References 2

  • github.com https://github.com/fedify-dev/fedify/releases/tag/2.2.3
  • github.com https://github.com/fedify-dev/fedify/security/advisories/GHSA-9rfg-v8g9-9367

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.