CVE-2024-52805— Synapse allows unsupported content types to lead to memory exhaustion
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I. Basic Information for CVE-2024-52805
Vulnerability Information
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Vulnerability Title
Synapse allows unsupported content types to lead to memory exhaustion
Source: NVD (National Vulnerability Database)
Vulnerability Description
Synapse is an open-source Matrix homeserver. In Synapse before 1.120.1, multipart/form-data requests can in certain configurations transiently increase memory consumption beyond expected levels while processing the request, which can be used to amplify denial of service attacks. Synapse 1.120.1 resolves the issue by denying requests with unsupported multipart/form-data content type.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
Element Synapse 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Element Synapse是Element开源的一个开源 Matrix 家庭服务器实现。 Element Synapse存在安全漏洞，该漏洞源于多部分/表单数据请求在某些配置下可能会在处理请求时暂时增加超出预期水平的内存消耗。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| element-hq | synapse | < 1.120.1 | - |
II. Public POCs for CVE-2024-52805
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · element-hq · 2024-12-03 · 6 CVEs total
| CVE-2024-37302 | 7.5 HIGH | Synapse denial of service through media disk space consumption |
| CVE-2024-37303 | 5.3 MEDIUM | Synapse unauthenticated writes to the media repository allow planting of problematic conte |
| CVE-2024-53867 | 4.3 MEDIUM | Synapse Matrix has a partial room state leak via Sliding Sync |
| CVE-2024-53863 | Synapse can be forced to thumbnail unexpected file formats, invoking external, potentially | |
| CVE-2024-52815 | Synapse allows a a malformed invite to break the invitee's `/sync` |
IV. Related Vulnerabilities
Same product: synapse
- CVE-2025-61672
Synapse: Invalid device keys degrade federation functionalit - CVE-2025-30355
Synapse vulnerable to federation denial of service via malfo - CVE-2024-37303
Synapse unauthenticated writes to the media repository allow - CVE-2024-37302
Synapse denial of service through media disk space consumpti - CVE-2024-52815
Synapse allows a a malformed invite to break the invitee's `
Same vendor: element-hq
- CVE-2026-24044
ESS Community Helm Chart has a weak server key generation me - CVE-2025-62425
Matrix Authentication Service account password can be change - CVE-2025-61672
Synapse: Invalid device keys degrade federation functionalit - CVE-2025-59161
In Element Web and Element Desktop, a malicious room can hid - CVE-2025-27599
Element X Android vulnerable to loading malicious web pages
Same weakness: CWE-770
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V. Comments for CVE-2024-52805
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