CVE-2026-42462
📛 CVE Title
(no title)
Description
Fedify has an LD-Signature Bypass via JSON-LD Named-Graph Restructuring
Description (MITRE) cveawg.mitre.org
Pulled from cveawg.mitre.org/api/cve/CVE-2026-42462 on 2026-07-27. Shown when MITRE's text differs from the cvelistV5 mirror.
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.
Overview
- State
- —
- Assigner (CNA)
- —
- CVSS severity
- high
- CVSS score
- 6.6 / 10
- CVSS vector
AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L- Effective score
- 6.6 / 10 HIGH source: CNA overview
- CWE(s)
- —
- Reserved
- —
- Published
- —
- Last updated
- —
- Source
- https://www.tenable.com/cve/CVE-2026-42462
- Linked Threat
- CVE-2026-42462 — CVE-2026-42462
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-06-10 22:16:57 UTC
- NVD last modified
- 2026-07-23 09:10:00 UTC
- NVD CVSS v3.1
- 7.0 / 10 HIGH source: security-advisories@github.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L- Exploitability subscore
- 2.2 / 10
- Impact subscore
- 4.7 / 10
- EPSS score
- 0.0017 (probability of exploitation in next 30 days)
- EPSS percentile
- 6.72% vs all CVEs — higher = more likely to be exploited, as of 2026-07-26
NVD-assigned CWE(s):
CWE-180,
CWE-347,
CWE-436,
CWE-1289
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-07-27 11:11 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-36127 - Assigner
- GitHub_M
- Published
- Jun 10, 2026, 8:22:35 PM
- Updated
- Jun 11, 2026, 1:34:03 PM
- EUVD base score (CVSS 3.1)
-
7.0 / 10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L - EUVD-reported EPSS
- 0.1700
- Vendors
- fedify-dev
- Products
-
fedify (1.10.0, < 1.10.10)fedify (< 1.9.11)fedify (2.0.0, < 2.0.18)fedify (2.2.0, < 2.2.3)fedify (2.1.0, < 2.1.14)
- Aliases
-
GHSA-9rfg-v8g9-9367
ENISA 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.
Vendor references (0)
References embedded in the original CVE record by the assigning CNA.
None in the CVE record.
MITRE references (2) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
- https://github.com/fedify-dev/fedify/releases/tag/2.2.3 x_refsource_MISC
- https://github.com/fedify-dev/fedify/security/advisories/GHSA-9rfg-v8g9-9367 x_refsource_CONFIRM
Web references (2)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://nvd.nist.gov/vuln/detail/CVE-2026-42462 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-42462 tenable:www.cve.org
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://github.com/fedify-dev/fedify/releases/tag/2.2.3 security-advisories@github.com
- https://github.com/fedify-dev/fedify/security/advisories/GHSA-9rfg-v8g9-9367 security-advisories@github.com
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blog.qualys.com
Microsoft and Adobe Patch Tuesday, April 2026 Security Update Review Posted in Patch Tuesday, Vulnerabilities and Threat Research 7 Diksha Ojha March 11, 2026 - 8 min read
2026-06-19 02:25 UTC -
web:blogs.oracle.com
For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.
2026-06-19 02:25 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-06-19 02:25 UTC -
web:oradba.ch
On April 21, 2026 , Oracle released the Critical Patch Update (CPU) for April 2026 — 481 new security fixes across the entire Oracle product stack. For Oracle Database, this means another round of mandatory patching. What makes this quarter unusual: several key Release Updates, including 19.31 and 23.26.2, were not available on release day and are delayed by up to a week or more.
2026-06-19 02:25 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-06-19 02:25 UTC -
web:support.microsoft.com
The following summary outlines key issues addressed by this update. The bold text within the brackets indicates the item or area of the change. [Networking] Fixed: This update addresses a security issue in the Windows Routing and Remote Access Service (RRAS) management tool. If you connect to a malicious remote server, an attacker could disrupt the tool or run code on your device. For more ...
2026-06-19 02:25 UTC -
web:www.oracle.com
This Critical Security Patch Update contains 35 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Security Patch Update and other Oracle Software Security Assurance activities is located at May 2026 Critical Security Patch Update: Executive Summary and Analysis.
2026-06-19 02:25 UTC -
web:www.pdq.com
May 2026 Patch Tuesday is here, and PDQ is back with another recap. Will we see another month of increased CVE volume? Is AI to blame? Dive in to learn more.
2026-06-19 02:25 UTC -
web:www.securityweek.com
Oracle on Tuesday announced the release of 481 new security patches as part of its April 2026 Critical Patch Update (CPU). Across the 28 product families that received security updates, more than 300 patches address vulnerabilities that are remotely exploitable without authentication. Roughly three dozen fixes resolve critical-severity security defects. There appear to be approximately 450 ...
2026-06-19 02:25 UTC -
web:www.tenable.com
Oracle addresses 241 CVEs in its April Critical Patch Update, the second quarterly update of 2026 with 481 patches, including 34 critical updates.
2026-06-19 02:25 UTC
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