Synapse
Vendor:
First CVE: May 28, 2026 · Active for under a year
2
Total CVEs
More Total CVEs than 49% of tracked products
2.0
Avg CVEs / Year
Higher CVE frequency than 60% of tracked products
4.1
Avg CVSS
Higher Avg CVSS than 2% of tracked products
0.0%
KEV Rate
Bottom 1%
Trends Over Time
The number and severity of CVEs published that impact Synapse over time
Volume of CVEsAvg CVSS Base Score
First CVE
May 28, 2026
56 days ago
Most Recent CVE
May 28, 2026
57 days ago
CVE Severity & Scoring
Synapse2 CVEs
50%
50%
All CVEs352,294 CVEs
45%
40%
11%
LowMedium
Attack Vector
Local1 (50.0%)
Network1 (50.0%)
Unknown0 (0.0%)
Physical0 (0.0%)
Adjacent Network0 (0.0%)
Attack Complexity
Low2 (100.0%)
High0 (0.0%)
Unknown0 (0.0%)
User Interaction
None2 (100.0%)
Unknown0 (0.0%)
Required0 (0.0%)
Privileges Required
Low1 (50.0%)
High1 (50.0%)
None0 (0.0%)
Unknown0 (0.0%)
Top CVEs
Signals from CVEs in this product scope (2 CVEs).
2 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2026-45078MEDIUM 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 | May 28, 2026 | 5.5 | 21 | NO | NO |
Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, in federated rooms, malicious homeservers can craft room events in such a way that prevents Synapse fr | May 28, 2026 | 2.7 | 16 | NO | NO |
Exploit Exposure
Signals from CVEs in this product scope (2 CVEs).
CISA KEV
0 CVEs
0.0% of CVEs· Bottom 1%
Metasploit
0 CVEs
0.0% of CVEs· Bottom 1%
Nuclei
0 CVEs
0.0% of CVEs· Bottom 1%
ExploitDB
0 CVEs
0.0% of CVEs· Bottom 1%
Social Chatter
Signals from CVEs in this product scope (2 CVEs).
Media Mentions
Signals from CVEs in this product scope (2 CVEs).
Top CNAs Publishing CVEs For Synapse
Top CWEs
Versions
No cataloged versions.