Search/CVE-2026-45078
● CVE — Medium

CVE-2026-45078

VendorelementProductsynapseDiscoveredMay 28, 2026UpdatedOct 26, 2026

Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1.

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CVSS v3.1
5.5 MEDIUM
EPSS
0.13%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Sep 25, 2026 → Oct 26, 2026
● 0.00pp
0.13% → 0.13% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorLOCAL
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
ConfidentialityNONE
IntegrityNONE
AvailabilityHIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Connections
2 relationships
Timeline
disclosure → media coverage
May 28, 2026
Disclosure — published as a CVE record. · last revised by NVD Oct 26, 2026