{"cve":"CVE-2024-52805","nvd":{"published":"2024-12-03T17:15:12.120","modified":"2026-06-17T08:07:39.657","status":"Analyzed","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.","cvss_v4":{"vector":"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","score":8.2},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770"],"references":["https://github.com/element-hq/synapse/security/advisories/GHSA-rfq8-j7rh-8hf2","https://github.com/twisted/twisted/issues/4688#issuecomment-1167705518","https://github.com/twisted/twisted/issues/4688#issuecomment-2385711609"],"products":["matrix:synapse"],"source":"nvd","synced_at":"2026-10-19T21:57:36.180738747+00:00"},"epss":{"cve":"CVE-2024-52805","score":0.00739,"percentile":0.54566,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-rfq8-j7rh-8hf2","url":"https://osv.dev/vulnerability/GHSA-rfq8-j7rh-8hf2","summary":"Synapse allows unsupported content types to lead to memory exhaustion","modified":"2026-07-07T17:56:28.661059355Z","packages":[{"ecosystem":"PyPI","name":"matrix-synapse","purl":"pkg:pypi/matrix-synapse","ranges":["<1.120.1"],"fixed":["1.120.1"]}]},{"id":"PYSEC-2026-1613","url":"https://osv.dev/vulnerability/PYSEC-2026-1613","summary":"Synapse allows unsupported content types to lead to memory exhaustion","modified":"2026-07-07T17:46:57.355211138Z","packages":[{"ecosystem":"PyPI","name":"matrix-synapse","purl":"pkg:pypi/matrix-synapse","ranges":["<1.120.1"],"fixed":["1.120.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}