CVE•Published 2026-06-10•Modified 2026-07-23•0 articles on news•3 live references•NVD data

CVE-2026-42462

Vulnerability data via NVD (ingested)

CVSS v3.1

7.0

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L

EPSS percentile

Exploit Prediction Scoring System · top 93% of all CVEs

Weaknesses (CWE)

CWE-180Incorrect Behavior Order: Validate Before Canonicalize CWE-347Improper Verification of Cryptographic Signature CWE-436Interpretation Conflict CWE-1289Improper Validation of Unsafe Equivalence in Input

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.

Timeline

Published 2026-06-10

Modified 2026-07-23

External references

NVD MITRE VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-42462

Hosts Shodan has explicitly fingerprinted as vulnerable.

More intel sources (5)

Shodan report

vuln:CVE-2026-42462

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2026-42462

Censys host search filtered to this CVE id.

grep.app

CVE-2026-42462