EUVD-2026-118394

Wanderer is a self-hosted trail database for saving and sharing adventures. Prior to 0.19.3, the unauthenticated GET /activitypub/trail/id and GET /activitypub/comment/id endpoints call ActivitypubTrail and ActivitypubComment to return full trail and comment records without applying the PocketBas...

CVE-2026-62344

Wanderer , a self-hosted trail database, is vulnerable to an authorization bypass in versions prior to 0.19.3 . The unauthenticated GET /activitypub/trail/{id} and GET /activitypub/comment/{id} endpoints call ActivitypubTrail() and ActivitypubComment() respectively, which return full records with...

CVE-2026-62344 Wanderer: Unauthenticated Access to Private Trails and Comments via ActivityPub Endpoints

Wanderer is a self-hosted trail database for saving and sharing adventures. Prior to 0.19.3, the unauthenticated GET /activitypub/trail/id and GET /activitypub/comment/id endpoints call ActivitypubTrail and ActivitypubComment to return full trail and comment records without applying the PocketBas...

cve-2026-47777

CVE-2026-47777 — Mastodon Featured Collections Authorization Bypass Overview I responsibly disclosed a High Severity Authorization Bypass vulnerability affecting Mastodon's experimental Featured Collections federation pipeline. CVE ID: CVE-2026-47777 Affected Component...

CVE-2026-63115

ActivityPub is a multi-tenant ActivityPub server for Ghost, built with Fedify. From 1.0.0 until 1.2.6, the Undo handler allows a remote federated server to cause the service to act on a follow or repost as though the activity came from a different account. This permits removal of an existing foll...

CVE-2026-63115 ActivityPub Undo handler can unfollow or remove reposts on behalf of other accounts

ActivityPub is a multi-tenant ActivityPub server for Ghost, built with Fedify. From 1.0.0 until 1.2.6, the Undo handler allows a remote federated server to cause the service to act on a follow or repost as though the activity came from a different account. This permits removal of an existing foll...

CVE-2026-63115 ActivityPub Undo handler can unfollow or remove reposts on behalf of other accounts

ActivityPub is a multi-tenant ActivityPub server for Ghost, built with Fedify. From 1.0.0 until 1.2.6, the Undo handler allows a remote federated server to cause the service to act on a follow or repost as though the activity came from a different account. This permits removal of an existing foll...

EUVD-2026-114518

ActivityPub is a multi-tenant ActivityPub server for Ghost, built with Fedify. From 1.0.0 until 1.2.6, the Undo handler allows a remote federated server to cause the service to act on a follow or repost as though the activity came from a different account. This permits removal of an existing foll...

CVE-2026-63115

The ActivityPub server (versions 1.0.0 through 1.2.6), a multi-tenant ActivityPub server for Ghost built with Fedify, contains a vulnerability in the Undo handler . This flaw allows a remote federated server to trigger actions as if they originated from a different account, enabling the unfollow ...

CVE-2026-63115 ActivityPub Undo handler can unfollow or remove reposts on behalf of other accounts

ActivityPub is a multi-tenant ActivityPub server for Ghost, built with Fedify. From 1.0.0 until 1.2.6, the Undo handler allows a remote federated server to cause the service to act on a follow or repost as though the activity came from a different account. This permits removal of an existing foll...

PT-2026-134226

ActivityPub is a multi-tenant ActivityPub server for Ghost, built with Fedify. From 1.0.0 until 1.2.6, the Undo handler allows a remote federated server to cause the service to act on a follow or repost as though the activity came from a different account. This permits removal of an existing foll...

CVE-2026-63115: TryGhost ActivityPub: ActivityPub is a multi-tenant ActivityPub server for Ghost, built with Fedify

ActivityPub is a multi-tenant ActivityPub server for Ghost, built with Fedify. From 1.0.0 until 1.2.6, the Undo handler allows a remote federated server to cause the service to act on a follow or repost as though the activity came from a different account. This permits removal of an existing foll...

CVE-2026-33693

CVE-2026-33693: SSRF via 0.0.0.0 Bypass in activitypub-federation-rust v4isinvalid CVSS 6.5 Moderate Keywords: SSRF, 0.0.0.0, IP validation bypass, activitypub-federation, Lemmy, Rust, ActivityPub Table of Contents Overview Vulnerability Details Technical Analysis Attack Chain Impact Remediation...

CVE-2026-116825 YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox

YesWiki from 4.6.2 before 4.7.0 lacks replay protection in HttpSignatureService::verifySignature, which never validates the Date header or tracks seen signatures. Attackers who capture a signed request to the /api/forms/formId/actor/inbox endpoint can replay it later to re-execute Delete, Update,...

CVE-2026-116825

The YesWiki software (versions 4.6.2 before 4.7.0 ) is vulnerable to an HTTP Signature Replay attack via the ActivityPub Inbox. The root cause is located in HttpSignatureService::verifySignature(), which fails to validate the Date header or track previously seen signatures. An attacker who captur...

CVE-2026-116825 YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox

YesWiki from 4.6.2 before 4.7.0 lacks replay protection in HttpSignatureService::verifySignature, which never validates the Date header or tracks seen signatures. Attackers who capture a signed request to the /api/forms/formId/actor/inbox endpoint can replay it later to re-execute Delete, Update,...

CVE-2026-116825 YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox

YesWiki from 4.6.2 before 4.7.0 lacks replay protection in HttpSignatureService::verifySignature, which never validates the Date header or tracks seen signatures. Attackers who capture a signed request to the /api/forms/formId/actor/inbox endpoint can replay it later to re-execute Delete, Update,...

CVE-2026-116208

YesWiki from 4.6.2 before 4.7.0 contains a missing authorization vulnerability in ActivityPubService::syncActorPosts that lets malicious ActivityPub servers manipulate other actors' mirrored entries. Attackers can serve a poisoned outbox with cross-actor Delete, Update, or Create activities durin...

CVE-2026-116208

YesWiki versions 4.6.2 before 4.7.0 are vulnerable to a missing authorization flaw in the ActivityPubService::syncActorPosts component. This issue allows malicious ActivityPub servers to manipulate the mirrored entries of other actors. During an admin-initiated sync, an attacker can provide a poi...

CVE-2026-116208 YesWiki 4.6.2 before 4.7.0 Missing Authorization in ActivityPub syncActorPosts

YesWiki from 4.6.2 before 4.7.0 contains a missing authorization vulnerability in ActivityPubService::syncActorPosts that lets malicious ActivityPub servers manipulate other actors' mirrored entries. Attackers can serve a poisoned outbox with cross-actor Delete, Update, or Create activities durin...