https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-03T02:26:34.075114+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2025-66622 CVE-2025-66622 — matrix-sdk-base is vulnerable to DoS via custom m.room.join_rules event values 2026-10-03T02:26:34.076832+00:00

Affected: matrix-org matrix-rust-sdk

matrix-sdk-base is the base component to build a Matrix client library. Versions 0.14.1 and prior are unable to handle responses that include custom m.room.join_rules values due to a serialization bug. This can be exploited to cause a denial-of-service condition, if a user is invited to a room with non-standard join rules, the crate's sync process will stall, preventing further processing for all rooms. This is fixed in version 0.16.0.

 https://cve.radiocsirt.org/vuln/ghsa-jj6p-3m75-g2p3 GHSA-jj6p-3m75-g2p3 — matrix-sdk-base denial of service via custom m.room.join_rules event values 2026-10-03T02:26:34.076917+00:00

Affected: crates.io: matrix-sdk-base

The matrix-sdk-base crate is unable to handle responses that include custom m.room.join_rules values due to a serialization bug.

This can be exploited to cause a denial-of-service condition, if a user is invited to a room with non-standard join rules, the crate's sync process will stall, preventing further processing for all rooms.

### Patches The issue is fixed in matrix-sdk-base 0.16.0.

### Workarounds

Users can leave affected rooms on another client to mitigate the issue.

### References

The issue was fixed in https://github.com/matrix-org/matrix-rust-sdk/pull/5924.