EUVD-2026-36127

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...

@fedify/botkit (>=0.4.0-dev.182, <=0.4.0-dev.183), @fedify/botkit-sqlite (>=0.4.0-dev.182, <=0.4.0-dev.183) +1 more potentially affected by CVE-2026-42462 via @fedify/fedify (>=2.0.0, <=2.0.17)

@fedify/fedify NPM version =2.0.0, =0.4.0-dev.182, =0.4.0-dev.182, =2.0.0, =2.0.17 Source cves: CVE-2026-42462 Source advisory: MEND:CVE-2026-42462...

@fedify/amqp (0.2.0-dev.12), @fedify/botkit (>=0.3.0-dev.125, <=0.4.0-dev.175) +3 more potentially affected by CVE-2026-42462 via @fedify/fedify (>=0.10.2, <=1.9.2)

@fedify/fedify NPM version =0.10.2, =0.3.0-dev.125, =0.4.0-dev.167, =0.3.0-dev.20, =0.1.0-dev.4, =0.4.0 Source cves: CVE-2026-42462 Source advisory: MEND:CVE-2026-42462...

CVE-2026-42462 Fedify has an LD-Signature Bypass via JSON-LD Named-Graph Restructuring

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...

@fedify/botkit (>=0.4.0-dev.177, <=0.4.0-dev.181), @fedify/botkit-sqlite (>=0.4.0-dev.177, <=0.4.0-dev.181) potentially affected by CVE-2026-42462 via @fedify/fedify (1.10.0)

@fedify/fedify NPM version 1.10.0 is affected by a known vulnerability. The following packages have a transitive dependency on @fedify/fedify and may be impacted: - @fedify/botkit =0.4.0-dev.177, =0.4.0-dev.177, =0.4.0-dev.181 Source cves: CVE-2026-42462 Source advisory: MEND:CVE-2026-42462...

@fedify/botkit (>=0.4.0-dev.184, <=0.5.0-dev.198), @fedify/botkit-sqlite (>=0.4.0-dev.184, <=0.5.0-dev.198) +1 more potentially affected by CVE-2026-42462 via @fedify/fedify (>=2.1.0, <=2.1.13)

@fedify/fedify NPM version =2.1.0, =0.4.0-dev.184, =0.4.0-dev.184, =2.1.0, =2.1.13 Source cves: CVE-2026-42462 Source advisory: MEND:CVE-2026-42462...

CVE-2026-42462

CVE-2026-42462 describes an LD-Signature bypass in Fedify caused by JSON-LD named-graph restructuring. The issue allows an attacker to reorganize a signed JSON-LD payload (via features like @graph, @reverse, @included) in a way that changes how the signed ActivityPub activity is interpreted witho...

CVE-2026-42462: Incorrect Behavior Order: Validate Before Canonicalize

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...

Fedify code-related vulnerabilities

Fedify is a TypeScript library developed by Hong Minhee. It is used to build federated server applications that support ActivityPub and other standards. Versions of Fedify prior to 1.9.12, 1.10.11, 2.0.19, 2.1.15, and 2.2.4 have code vulnerabilities. These vulnerabilities stem from an incomplete...

PT-2026-48548

Name of the Vulnerable Software and Affected Versions Fedify versions 0.11.2 through 1.9.11 Fedify versions 0.11.2 through 1.10.10 Fedify versions 0.11.2 through 2.0.18 Fedify versions 0.11.2 through 2.1.14 Fedify versions 0.11.2 through 2.2.3 Description Fedify is a TypeScript library for buildi...

CVE-2026-50131: Server-Side Request Forgery (SSRF)

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Fedify previously addressed SSRF/internal network access in GHSA-p9cg-vqcc-grcx by adding public URL validation before runtime document and media fetching. However, the IPv4 validation logic present starting...

Fedify security vulnerabilities

Fedify is a TypeScript library developed by Hong Minhee. It is used to build federated server applications that support ActivityPub and other standards. Versions of Fedify prior to 1.9.11, 1.10.10, 2.0.18, 2.1.14, and 2.2.3 have security vulnerabilities. These vulnerabilities stem from attackers...

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

As told on Discord earlier, multiple projects are affected, and we would like to coordinate. For now, we are aiming at a May 6th release date, but this is not set in stone yet. Summary An attacker can make use of JSON-LD features to restructure a JSON-LD document that would change how Fedify...

@fedify/botkit (>=0.4.0-dev.182, <=0.4.0-dev.183), @fedify/botkit-sqlite (>=0.4.0-dev.182, <=0.4.0-dev.183) +1 more potentially affected by CVE-2026-42462 via @fedify/fedify (>=2.0.0, <=2.0.17)

@fedify/fedify NPM version =2.0.0, =0.4.0-dev.182, =0.4.0-dev.182, =2.0.0, =2.0.17 Source cves: CVE-2026-42462 Source advisory: GHSA-9RFG-V8G9-9367...

@fedify/amqp (0.2.0-dev.12), @fedify/botkit (>=0.3.0-dev.125, <=0.4.0-dev.175) +3 more potentially affected by CVE-2026-42462 via @fedify/fedify (>=1.5.0-dev.732, <=1.9.2)

@fedify/fedify NPM version =1.5.0-dev.732, =0.3.0-dev.125, =0.4.0-dev.167, =0.3.0-dev.20, =0.4.0-dev.18, =0.4.0 Source cves: CVE-2026-42462 Source advisory: OSV:GHSA-9RFG-V8G9-9367...

@fedify/cli (>=2.2.0, <=2.2.3-dev.1098) potentially affected by CVE-2026-42462 via @fedify/fedify (>=2.2.0, <=2.2.3-dev.1098)

@fedify/fedify NPM version =2.2.0, =2.2.0, =2.2.3-dev.1098 Source cves: CVE-2026-42462 Source advisory: SNYK:JS-FEDIFYFEDIFY-16895732...

@fedify/botkit (>=0.4.0-dev.177, <=0.4.0-dev.181), @fedify/botkit-sqlite (>=0.4.0-dev.177, <=0.4.0-dev.181) potentially affected by CVE-2026-42462 via @fedify/fedify (1.10.0)

@fedify/fedify NPM version 1.10.0 is affected by a known vulnerability. The following packages have a transitive dependency on @fedify/fedify and may be impacted: - @fedify/botkit =0.4.0-dev.177, =0.4.0-dev.177, =0.4.0-dev.181 Source cves: CVE-2026-42462 Source advisory: OSV:GHSA-9RFG-V8G9-9367...

@fedify/botkit (>=0.4.0-dev.184, <=0.5.0-dev.198), @fedify/botkit-sqlite (>=0.4.0-dev.184, <=0.5.0-dev.198) +1 more potentially affected by CVE-2026-42462 via @fedify/fedify (>=2.1.0, <=2.1.13)

@fedify/fedify NPM version =2.1.0, =0.4.0-dev.184, =0.4.0-dev.184, =2.1.0, =2.1.13 Source cves: CVE-2026-42462 Source advisory: GHSA-9RFG-V8G9-9367...

@fedify/botkit (>=0.4.0-dev.184, <=0.5.0-dev.198), @fedify/botkit-sqlite (>=0.4.0-dev.184, <=0.5.0-dev.198) +1 more potentially affected by CVE-2026-42462 via @fedify/fedify (>=2.1.0, <=2.1.13)

@fedify/fedify NPM version =2.1.0, =0.4.0-dev.184, =0.4.0-dev.184, =2.1.0, =2.1.13 Source cves: CVE-2026-42462 Source advisory: OSV:GHSA-9RFG-V8G9-9367...

@fedify/botkit (>=0.4.0-dev.182, <=0.4.0-dev.183), @fedify/botkit-sqlite (>=0.4.0-dev.182, <=0.4.0-dev.183) +1 more potentially affected by CVE-2026-42462 via @fedify/fedify (>=2.0.0, <=2.0.17)

@fedify/fedify NPM version =2.0.0, =0.4.0-dev.182, =0.4.0-dev.182, =2.0.0, =2.0.17 Source cves: CVE-2026-42462 Source advisory: SNYK:JS-FEDIFYFEDIFY-16895732...