CVE-2024-52805

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/element-hq/synapse/security/advisories/GHSA-rfq8-j7rh-8hf2	Vendor Advisory
https://github.com/twisted/twisted/issues/4688#issuecomment-1167705518	Issue Tracking
https://github.com/twisted/twisted/issues/4688#issuecomment-2385711609	Issue Tracking

Configurations

Configuration 1 (hide)

cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*

History

26 Aug 2025, 15:06

Type	Values Removed	Values Added
References	~~() https://github.com/element-hq/synapse/security/advisories/GHSA-rfq8-j7rh-8hf2 -~~	() https://github.com/element-hq/synapse/security/advisories/GHSA-rfq8-j7rh-8hf2 - Vendor Advisory
References	~~() https://github.com/twisted/twisted/issues/4688#issuecomment-1167705518 -~~	() https://github.com/twisted/twisted/issues/4688#issuecomment-1167705518 - Issue Tracking
References	~~() https://github.com/twisted/twisted/issues/4688#issuecomment-2385711609 -~~	() https://github.com/twisted/twisted/issues/4688#issuecomment-2385711609 - Issue Tracking
First Time		Matrix synapse Matrix
CPE		cpe:2.3:a:matrix:synapse::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

Information

Published : 2024-12-03 17:15

Updated : 2025-08-26 15:06

NVD link : CVE-2024-52805

Mitre link : CVE-2024-52805

CVE.ORG link : CVE-2024-52805

JSON object : View

Products Affected

matrix

synapse

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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