CVE-2024-52805
HIGH7.5EPSS 1.1%Synapse allows unsupported content types to lead to memory exhaustion
Published: 12/3/2024Modified: 5/20/2026
Also known as:DEBIAN-CVE-2024-52805
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.
Affected packages (2)
- Debian/matrix-synapsefrom 0, < 1.121.0-1
- PyPI/matrix-synapsefrom 0, < 1.120.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2024-52805
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2024-52805
- PATCHhttps://github.com/element-hq/synapse
- WEBhttps://github.com/element-hq/synapse/security/advisories/GHSA-rfq8-j7rh-8hf2
- WEBhttps://github.com/twisted/twisted/issues/4688#issuecomment-1167705518
- WEBhttps://github.com/twisted/twisted/issues/4688#issuecomment-2385711609