CVE-2026-57213

RabbitMQ’s rabbitmq_federation_management plugin is vulnerable to stored XSS on the Federation Status page because consumer_tag is rendered without HTML escaping. Prior to the fixed releases (3.13.14, 4.0.19, 4.1.10, 4.2.5), a user who can configure a federation upstream or policy could inject co...

CVE-2026-57213 RabbitMQ: Stored XSS federation management plugin via unsanitized consumer_tag rendering

RabbitMQ is a messaging and streaming broker. Prior to 3.13.14, 4.0.19, 4.1.10, and 4.2.5, the rabbitmqfederationmanagement plugin renders the consumertag field on the Federation Status page without HTML escaping, allowing a user who can configure a federation upstream or policy to execute...

CVE-2026-57213 RabbitMQ: Stored XSS federation management plugin via unsanitized consumer_tag rendering

RabbitMQ is a messaging and streaming broker. Prior to 3.13.14, 4.0.19, 4.1.10, and 4.2.5, the rabbitmqfederationmanagement plugin renders the consumertag field on the Federation Status page without HTML escaping, allowing a user who can configure a federation upstream or policy to execute...

CVE-2026-57213

RabbitMQ is a messaging and streaming broker. Prior to 3.13.14, 4.0.19, 4.1.10, and 4.2.5, the rabbitmqfederationmanagement plugin renders the consumertag field on the Federation Status page without HTML escaping, allowing a user who can configure a federation upstream or policy to execute...

EUVD-2026-42952

PeerTube is an ActivityPub-federated video streaming platform. Prior to 8.2.2, server-side-rendered video watch pages embed a schema.org JSON-LD block by JSON.stringify-ing video metadata without escaping less-than, greater-than, or slash characters, allowing a value containing the byte sequence...

PT-2026-57298

RabbitMQ is a messaging and streaming broker. Prior to 3.13.14, 4.0.19, 4.1.10, and 4.2.5, the rabbitmq federation management plugin renders the consumer tag field on the Federation Status page without HTML escaping, allowing a user who can configure a federation upstream or policy to execute...

PYSEC-2026-1612 Synapse's invalid device keys degrade federation functionality

Impact Lack of validation for device keys in Synapse before 1.138.3 and in Synapse 1.139.0 allow an attacker registered on the victim homeserver to degrade federation functionality, unpredictably breaking outbound federation to other homeservers. Patches Patched in Synapse 1.138.3, 1.138.4,...

PYSEC-2026-1614 Synapse vulnerable to federation denial of service via malformed events

Impact A malicious server can craft events with a depth outside the integer range allowed by Canonical JSON. When such an event is received by Synapse version up to 1.127.0, it prevents it from federating with other servers. The vulnerability has been exploited in the wild. Patches Fixed in Synap...

PYSEC-2026-1611 Synapse allows a a malformed invite to break the invitee's `/sync`

Impact Synapse versions before 1.120.1 fail to properly validate invites received over federation. This vulnerability allows a malicious server to send a specially crafted invite that disrupts the invited user's /sync functionality. Patches Synapse 1.120.1 rejects such invalid invites received ov...

rabbitmq-server: RabbitMQ: Information Disclosure via Cross-Site Scripting in Federation Management

A flaw was found in the RabbitMQ rabbitmqfederationmanagement plugin. This cross-site scripting XSS vulnerability occurs because the consumertag field on the Federation Status page does not properly escape HTML. A user with permissions to configure a federation upstream or policy can exploit this...

rabbitmq-server: RabbitMQ: Information Disclosure via Cross-Site Scripting in Federation Management

A flaw was found in the RabbitMQ rabbitmqfederationmanagement plugin. This cross-site scripting XSS vulnerability occurs because the consumertag field on the Federation Status page does not properly escape HTML. A user with permissions to configure a federation upstream or policy can exploit this...

Matrix Synapse DoS

Matrix Synapse before 0.28.1 is prone to a denial of service flaw where malicious events injected with depth = 263 - 1 render rooms unusable, related to federation/federationbase.py and handlers/message.py, as exploited in the wild in April 2018...

PYSEC-2026-821 OpenStack Horizon Cross-site Scripting (XSS)

OpenStack Horizon 9.x through 9.1.1, 10.x through 10.0.2, and 11.0.0 allows remote authenticated administrators to conduct XSS attacks via a crafted federation mapping...

OpenStack Horizon Cross-site Scripting (XSS)

OpenStack Horizon 9.x through 9.1.1, 10.x through 10.0.2, and 11.0.0 allows remote authenticated administrators to conduct XSS attacks via a crafted federation mapping...

PYSEC-2026-664 Matrix Synapse Security Filtering Flaw

The ongetmissingevents function in handlers/federation.py in Matrix Synapse before 0.31.1 has a security bug in the getmissingevents federation API where event visibility rules were not applied correctly...

CVE-2026-58593

NodeBB does not bind the claimed author of an inbound ActivityPub object to the authenticated remote actor. The inbound middleware verifies the HTTP-signature actor and checks the origin of object.id, but never validates that attributedTo corresponds to the sender. In the object mock, attributedT...

CVE-2026-58593

NodeBB does not bind the claimed author of an inbound ActivityPub object to the authenticated remote actor. The inbound middleware verifies the HTTP-signature actor and checks the origin of object.id, but never validates that attributedTo corresponds to the sender. In the object mock, attributedT...

CVE-2026-58593 NodeBB - ActivityPub Author Spoofing via Unvalidated attributedTo Mapped to Local User

NodeBB does not bind the claimed author of an inbound ActivityPub object to the authenticated remote actor. The inbound middleware verifies the HTTP-signature actor and checks the origin of object.id, but never validates that attributedTo corresponds to the sender. In the object mock, attributedT...

EUVD-2026-41131

NodeBB does not bind the claimed author of an inbound ActivityPub object to the authenticated remote actor. The inbound middleware verifies the HTTP-signature actor and checks the origin of object.id, but never validates that attributedTo corresponds to the sender. In the object mock, attributedT...

CVE-2026-58593 NodeBB - ActivityPub Author Spoofing via Unvalidated attributedTo Mapped to Local User

NodeBB does not bind the claimed author of an inbound ActivityPub object to the authenticated remote actor. The inbound middleware verifies the HTTP-signature actor and checks the origin of object.id, but never validates that attributedTo corresponds to the sender. In the object mock, attributedT...