Most recent entries from all

EUVD-2026-205716

fkie_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.

GHSA-56w4-5538-8v8h — Synapse Matrix has a partial room state leak via Sliding Sync

Affected: PyPI: matrix-synapse

### Impact 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.

### Patches Synapse version 1.120.1 fixes the problem.

### Workarounds Disable Sliding Sync.

### References https://github.com/matrix-org/matrix-spec-proposals/pull/4186 https://github.com/element-hq/synapse/blob/d80cd57c54427687afcb48740d99219c88a0fff1/synapse/config/experimental.py#L341-L344

### For more information

If you have any questions or comments about this advisory, please email us at [security at element.io](mailto:security@element.io).

openSUSE-SU-2024:14541-1 — matrix-synapse-1.120.2-1.1 on GA media

matrix-synapse-1.120.2-1.1 on GA media

PYSEC-2026-1610 — Synapse Matrix has a partial room state leak via Sliding Sync

Affected: PyPI: matrix-synapse

### Patches Synapse version 1.120.1 fixes the problem.

### Workarounds Disable Sliding Sync.

### For more information

If you have any questions or comments about this advisory, please email us at [security at element.io](mailto:security@element.io).

Withdrawn: UBUNTU-CVE-2024-53867

Withdrawn by the publisher.

Affected: Ubuntu:Pro:18.04:LTS: matrix-synapse, Ubuntu:20.04:LTS: matrix-synapse, Ubuntu:22.04:LTS: matrix-synapse, Ubuntu:24.04:LTS: matrix-synapse