Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, in federated rooms, malicious homeservers can craft room events in such a way that prevents Synapse from providing full history to paginating clients. Clients could therefore fail to display room history. This vulnerability is fixed in 1.152.1.
Metrics
Affected Vendors & Products
References
History
Thu, 04 Jun 2026 18:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Element
Element synapse |
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| CPEs | cpe:2.3:a:element:synapse:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Element
Element synapse |
|
| Metrics |
cvssV3_1
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Tue, 02 Jun 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Thu, 28 May 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Element-hq
Element-hq synapse |
|
| Vendors & Products |
Element-hq
Element-hq synapse |
Thu, 28 May 2026 17:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, in federated rooms, malicious homeservers can craft room events in such a way that prevents Synapse from providing full history to paginating clients. Clients could therefore fail to display room history. This vulnerability is fixed in 1.152.1. | |
| Title | Synapse pagination denial of service | |
| Weaknesses | CWE-20 | |
| References |
| |
| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-05-28T15:50:25.842Z
Updated: 2026-06-02T14:51:34.553Z
Reserved: 2026-05-08T18:45:10.096Z
Link: CVE-2026-45076
Updated: 2026-06-02T14:51:26.936Z
Status : Analyzed
Published: 2026-05-28T17:16:31.590
Modified: 2026-06-04T18:04:26.643
Link: CVE-2026-45076
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