CVE-2026-63097: Incorrect Authorization

Dendrite through 0.13.8 contains an improper access control vulnerability in the syncapi /context endpoint syncapi/routing/context.go that allows authenticated local users to access post-leave room state events by exploiting a flawed membership check that evaluates only the RoomExists field while...

CVE-2024-53867

Synapse is an open-source Matrix homeserver. The Sliding Sync feature on Synapse versions between 1.113.0rc1 and 1.120.0 can leak partial room state changes to users no longer in a room. Non-state events, like messages, are unaffected. This vulnerability is fixed in 1.120.1...

UBUNTU-CVE-2024-53867

Synapse is an open-source Matrix homeserver. The Sliding Sync feature on Synapse versions between 1.113.0rc1 and 1.120.0 can leak partial room state changes to users no longer in a room. Non-state events, like messages, are unaffected. This vulnerability is fixed in 1.120.1...

CVE-2023-32323 Synapse Outgoing federation to specific hosts can be disabled by sending malicious invites

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. A malicious user on a Synapse homeserver X with permission to create certain state events can disable outbound federation from X to an arbitrary homeserver Y. Synapse instances with federation disable...

CVE-2023-32323 Synapse Outgoing federation to specific hosts can be disabled by sending malicious invites

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. A malicious user on a Synapse homeserver X with permission to create certain state events can disable outbound federation from X to an arbitrary homeserver Y. Synapse instances with federation disable...

CVE-2023-32323

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. A malicious user on a Synapse homeserver X with permission to create certain state events can disable outbound federation from X to an arbitrary homeserver Y. Synapse instances with federation disable...

Matrix Synapse 输入验证错误漏洞

Matrix Synapse is a Matrix Management Server implementation from the Matrix Foundation in the UK. A security vulnerability exists in Matrix Synapse that originates from the fact that a malicious user on Synapse master server X who is authorized to create certain state events can disable outbound...