CVEDB API

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-45078

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.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.0

EPSS Ranking 3.0%

CVSS Severity

CVSS v3 Score 5.5

References

https://github.com/element-hq/synapse/security/advisories/GHSA-8q93-326v-3m7g

Products affected by CVE-2026-45078

Element » Synapse » Version: 0.0.0

cpe:2.3:a:element:synapse:0.0.0
Element » Synapse » Version: 0.0.1

cpe:2.3:a:element:synapse:0.0.1
Element » Synapse » Version: 0.1

cpe:2.3:a:element:synapse:0.1
Element » Synapse » Version: 0.1.0

cpe:2.3:a:element:synapse:0.1.0
Element » Synapse » Version: 0.1.1

cpe:2.3:a:element:synapse:0.1.1
Element » Synapse » Version: 0.1.2

cpe:2.3:a:element:synapse:0.1.2
Element » Synapse » Version: 0.10.0

cpe:2.3:a:element:synapse:0.10.0
Element » Synapse » Version: 0.10.1

cpe:2.3:a:element:synapse:0.10.1
Element » Synapse » Version: 0.11.0

cpe:2.3:a:element:synapse:0.11.0
Element » Synapse » Version: 0.11.1

cpe:2.3:a:element:synapse:0.11.1
Element » Synapse » Version: 0.12.0

cpe:2.3:a:element:synapse:0.12.0
Element » Synapse » Version: 0.12.1

cpe:2.3:a:element:synapse:0.12.1
Element » Synapse » Version: 0.13.0

cpe:2.3:a:element:synapse:0.13.0
Element » Synapse » Version: 0.13.1

cpe:2.3:a:element:synapse:0.13.1
Element » Synapse » Version: 0.13.2

cpe:2.3:a:element:synapse:0.13.2
Element » Synapse » Version: 0.13.3

cpe:2.3:a:element:synapse:0.13.3
Element » Synapse » Version: 0.14.0

cpe:2.3:a:element:synapse:0.14.0
Element » Synapse » Version: 0.15.0

cpe:2.3:a:element:synapse:0.15.0
Element » Synapse » Version: 0.16.0

cpe:2.3:a:element:synapse:0.16.0
Element » Synapse » Version: 0.16.1

cpe:2.3:a:element:synapse:0.16.1
Element » Synapse » Version: 0.17.0

cpe:2.3:a:element:synapse:0.17.0
Element » Synapse » Version: 0.17.1

cpe:2.3:a:element:synapse:0.17.1
Element » Synapse » Version: 0.17.2

cpe:2.3:a:element:synapse:0.17.2
Element » Synapse » Version: 0.17.3

cpe:2.3:a:element:synapse:0.17.3
Element » Synapse » Version: 0.18.0

cpe:2.3:a:element:synapse:0.18.0
Element » Synapse » Version: 0.18.1

cpe:2.3:a:element:synapse:0.18.1
Element » Synapse » Version: 0.18.2

cpe:2.3:a:element:synapse:0.18.2
Element » Synapse » Version: 0.18.3

cpe:2.3:a:element:synapse:0.18.3
Element » Synapse » Version: 0.18.4

cpe:2.3:a:element:synapse:0.18.4
Element » Synapse » Version: 0.18.5

cpe:2.3:a:element:synapse:0.18.5
Element » Synapse » Version: 0.18.6

cpe:2.3:a:element:synapse:0.18.6
Element » Synapse » Version: 0.18.7

cpe:2.3:a:element:synapse:0.18.7
Element » Synapse » Version: 0.19.0

cpe:2.3:a:element:synapse:0.19.0
Element » Synapse » Version: 0.19.1

cpe:2.3:a:element:synapse:0.19.1
Element » Synapse » Version: 0.19.2

cpe:2.3:a:element:synapse:0.19.2
Element » Synapse » Version: 0.19.3

cpe:2.3:a:element:synapse:0.19.3
Element » Synapse » Version: 0.2.0

cpe:2.3:a:element:synapse:0.2.0
Element » Synapse » Version: 0.2.1

cpe:2.3:a:element:synapse:0.2.1
Element » Synapse » Version: 0.2.2

cpe:2.3:a:element:synapse:0.2.2
Element » Synapse » Version: 0.2.3

cpe:2.3:a:element:synapse:0.2.3
Element » Synapse » Version: 0.20.0

cpe:2.3:a:element:synapse:0.20.0
Element » Synapse » Version: 0.21.0

cpe:2.3:a:element:synapse:0.21.0
Element » Synapse » Version: 0.21.1

cpe:2.3:a:element:synapse:0.21.1
Element » Synapse » Version: 0.22.0

cpe:2.3:a:element:synapse:0.22.0
Element » Synapse » Version: 0.22.1

cpe:2.3:a:element:synapse:0.22.1
Element » Synapse » Version: 0.23.0

cpe:2.3:a:element:synapse:0.23.0
Element » Synapse » Version: 0.23.1

cpe:2.3:a:element:synapse:0.23.1
Element » Synapse » Version: 0.24.0

cpe:2.3:a:element:synapse:0.24.0
Element » Synapse » Version: 0.24.1

cpe:2.3:a:element:synapse:0.24.1
Element » Synapse » Version: 0.25.0

cpe:2.3:a:element:synapse:0.25.0
Element » Synapse » Version: 0.25.1

cpe:2.3:a:element:synapse:0.25.1
Element » Synapse » Version: 0.26.0

cpe:2.3:a:element:synapse:0.26.0
Element » Synapse » Version: 0.26.1

cpe:2.3:a:element:synapse:0.26.1
Element » Synapse » Version: 0.27.0

cpe:2.3:a:element:synapse:0.27.0
Element » Synapse » Version: 0.27.1

cpe:2.3:a:element:synapse:0.27.1
Element » Synapse » Version: 0.27.2

cpe:2.3:a:element:synapse:0.27.2
Element » Synapse » Version: 0.27.3

cpe:2.3:a:element:synapse:0.27.3
Element » Synapse » Version: 0.27.4

cpe:2.3:a:element:synapse:0.27.4
Element » Synapse » Version: 0.28.0

cpe:2.3:a:element:synapse:0.28.0
Element » Synapse » Version: 0.28.1

cpe:2.3:a:element:synapse:0.28.1
Element » Synapse » Version: 0.29.0

cpe:2.3:a:element:synapse:0.29.0
Element » Synapse » Version: 0.29.1

cpe:2.3:a:element:synapse:0.29.1
Element » Synapse » Version: 0.3.0

cpe:2.3:a:element:synapse:0.3.0
Element » Synapse » Version: 0.3.1

cpe:2.3:a:element:synapse:0.3.1
Element » Synapse » Version: 0.3.2

cpe:2.3:a:element:synapse:0.3.2
Element » Synapse » Version: 0.3.3

cpe:2.3:a:element:synapse:0.3.3
Element » Synapse » Version: 0.3.4

cpe:2.3:a:element:synapse:0.3.4
Element » Synapse » Version: 0.30.0

cpe:2.3:a:element:synapse:0.30.0
Element » Synapse » Version: 0.31.0

cpe:2.3:a:element:synapse:0.31.0
Element » Synapse » Version: 0.31.1

cpe:2.3:a:element:synapse:0.31.1
Element » Synapse » Version: 0.31.2

cpe:2.3:a:element:synapse:0.31.2
Element » Synapse » Version: 0.32.0

cpe:2.3:a:element:synapse:0.32.0
Element » Synapse » Version: 0.32.1

cpe:2.3:a:element:synapse:0.32.1
Element » Synapse » Version: 0.32.2

cpe:2.3:a:element:synapse:0.32.2
Element » Synapse » Version: 0.33.0

cpe:2.3:a:element:synapse:0.33.0
Element » Synapse » Version: 0.33.1

cpe:2.3:a:element:synapse:0.33.1
Element » Synapse » Version: 0.33.2

cpe:2.3:a:element:synapse:0.33.2
Element » Synapse » Version: 0.33.2.1

cpe:2.3:a:element:synapse:0.33.2.1
Element » Synapse » Version: 0.33.3

cpe:2.3:a:element:synapse:0.33.3
Element » Synapse » Version: 0.33.3.1

cpe:2.3:a:element:synapse:0.33.3.1
Element » Synapse » Version: 0.33.4

cpe:2.3:a:element:synapse:0.33.4
Element » Synapse » Version: 0.33.5

cpe:2.3:a:element:synapse:0.33.5
Element » Synapse » Version: 0.33.5.1

cpe:2.3:a:element:synapse:0.33.5.1
Element » Synapse » Version: 0.33.6

cpe:2.3:a:element:synapse:0.33.6
Element » Synapse » Version: 0.33.7

cpe:2.3:a:element:synapse:0.33.7
Element » Synapse » Version: 0.33.8

cpe:2.3:a:element:synapse:0.33.8
Element » Synapse » Version: 0.33.9

cpe:2.3:a:element:synapse:0.33.9
Element » Synapse » Version: 0.34.0

cpe:2.3:a:element:synapse:0.34.0
Element » Synapse » Version: 0.34.0.1

cpe:2.3:a:element:synapse:0.34.0.1
Element » Synapse » Version: 0.34.1

cpe:2.3:a:element:synapse:0.34.1
Element » Synapse » Version: 0.34.1.1

cpe:2.3:a:element:synapse:0.34.1.1
Element » Synapse » Version: 0.4.1

cpe:2.3:a:element:synapse:0.4.1
Element » Synapse » Version: 0.4.2

cpe:2.3:a:element:synapse:0.4.2
Element » Synapse » Version: 0.5.0

cpe:2.3:a:element:synapse:0.5.0
Element » Synapse » Version: 0.5.1

cpe:2.3:a:element:synapse:0.5.1
Element » Synapse » Version: 0.5.2

cpe:2.3:a:element:synapse:0.5.2
Element » Synapse » Version: 0.5.3

cpe:2.3:a:element:synapse:0.5.3
Element » Synapse » Version: 0.5.4

cpe:2.3:a:element:synapse:0.5.4
Element » Synapse » Version: 0.6.0

cpe:2.3:a:element:synapse:0.6.0
Element » Synapse » Version: 0.6.1

cpe:2.3:a:element:synapse:0.6.1
Element » Synapse » Version: 0.7.0

cpe:2.3:a:element:synapse:0.7.0
Element » Synapse » Version: 0.7.1

cpe:2.3:a:element:synapse:0.7.1
Element » Synapse » Version: 0.8.0

cpe:2.3:a:element:synapse:0.8.0
Element » Synapse » Version: 0.8.1

cpe:2.3:a:element:synapse:0.8.1
Element » Synapse » Version: 0.9.0

cpe:2.3:a:element:synapse:0.9.0
Element » Synapse » Version: 0.9.1

cpe:2.3:a:element:synapse:0.9.1
Element » Synapse » Version: 0.9.2

cpe:2.3:a:element:synapse:0.9.2
Element » Synapse » Version: 0.9.3

cpe:2.3:a:element:synapse:0.9.3
Element » Synapse » Version: 0.9.4

cpe:2.3:a:element:synapse:0.9.4
Element » Synapse » Version: 0.99.0

cpe:2.3:a:element:synapse:0.99.0
Element » Synapse » Version: 0.99.1

cpe:2.3:a:element:synapse:0.99.1
Element » Synapse » Version: 0.99.1.1

cpe:2.3:a:element:synapse:0.99.1.1
Element » Synapse » Version: 0.99.2

cpe:2.3:a:element:synapse:0.99.2
Element » Synapse » Version: 0.99.3

cpe:2.3:a:element:synapse:0.99.3
Element » Synapse » Version: 0.99.3.1

cpe:2.3:a:element:synapse:0.99.3.1
Element » Synapse » Version: 0.99.3.2

cpe:2.3:a:element:synapse:0.99.3.2
Element » Synapse » Version: 0.99.4

cpe:2.3:a:element:synapse:0.99.4
Element » Synapse » Version: 0.99.5

cpe:2.3:a:element:synapse:0.99.5
Element » Synapse » Version: 0.99.5.1

cpe:2.3:a:element:synapse:0.99.5.1
Element » Synapse » Version: 0.99.5.2

cpe:2.3:a:element:synapse:0.99.5.2
Element » Synapse » Version: 1.0.0

cpe:2.3:a:element:synapse:1.0.0
Element » Synapse » Version: 1.1.0

cpe:2.3:a:element:synapse:1.1.0
Element » Synapse » Version: 1.10.0

cpe:2.3:a:element:synapse:1.10.0
Element » Synapse » Version: 1.105.1

cpe:2.3:a:element:synapse:1.105.1
Element » Synapse » Version: 1.106.0

cpe:2.3:a:element:synapse:1.106.0
Element » Synapse » Version: 1.120.1

cpe:2.3:a:element:synapse:1.120.1
Element » Synapse » Version: 1.127.1

cpe:2.3:a:element:synapse:1.127.1
Element » Synapse » Version: 1.128.0

cpe:2.3:a:element:synapse:1.128.0
Element » Synapse » Version: 1.129.0

cpe:2.3:a:element:synapse:1.129.0
Element » Synapse » Version: 1.130.0

cpe:2.3:a:element:synapse:1.130.0
Element » Synapse » Version: 1.131.0

cpe:2.3:a:element:synapse:1.131.0
Element » Synapse » Version: 1.132.0

cpe:2.3:a:element:synapse:1.132.0
Element » Synapse » Version: 1.133.0

cpe:2.3:a:element:synapse:1.133.0
Element » Synapse » Version: 1.134.0

cpe:2.3:a:element:synapse:1.134.0
Element » Synapse » Version: 1.135.0

cpe:2.3:a:element:synapse:1.135.0
Element » Synapse » Version: 1.135.1

cpe:2.3:a:element:synapse:1.135.1
Element » Synapse » Version: 1.135.2

cpe:2.3:a:element:synapse:1.135.2
Element » Synapse » Version: 1.136.0

cpe:2.3:a:element:synapse:1.136.0
Element » Synapse » Version: 1.137.0

cpe:2.3:a:element:synapse:1.137.0
Element » Synapse » Version: 1.138.0

cpe:2.3:a:element:synapse:1.138.0
Element » Synapse » Version: 1.138.1

cpe:2.3:a:element:synapse:1.138.1
Element » Synapse » Version: 1.138.2

cpe:2.3:a:element:synapse:1.138.2
Element » Synapse » Version: 1.138.3

cpe:2.3:a:element:synapse:1.138.3
Element » Synapse » Version: 1.138.4

cpe:2.3:a:element:synapse:1.138.4
Element » Synapse » Version: 1.139.0

cpe:2.3:a:element:synapse:1.139.0
Element » Synapse » Version: 1.139.1

cpe:2.3:a:element:synapse:1.139.1
Element » Synapse » Version: 1.139.2

cpe:2.3:a:element:synapse:1.139.2
Element » Synapse » Version: 1.140.0

cpe:2.3:a:element:synapse:1.140.0
Element » Synapse » Version: 1.141.0

cpe:2.3:a:element:synapse:1.141.0
Element » Synapse » Version: 1.142.0

cpe:2.3:a:element:synapse:1.142.0
Element » Synapse » Version: 1.142.1

cpe:2.3:a:element:synapse:1.142.1
Element » Synapse » Version: 1.143.0

cpe:2.3:a:element:synapse:1.143.0
Element » Synapse » Version: 1.144.0

cpe:2.3:a:element:synapse:1.144.0
Element » Synapse » Version: 1.145.0

cpe:2.3:a:element:synapse:1.145.0
Element » Synapse » Version: 1.146.0

cpe:2.3:a:element:synapse:1.146.0
Element » Synapse » Version: 1.147.0

cpe:2.3:a:element:synapse:1.147.0
Element » Synapse » Version: 1.147.1

cpe:2.3:a:element:synapse:1.147.1
Element » Synapse » Version: 1.148.0

cpe:2.3:a:element:synapse:1.148.0
Element » Synapse » Version: 1.149.0

cpe:2.3:a:element:synapse:1.149.0
Element » Synapse » Version: 1.149.1

cpe:2.3:a:element:synapse:1.149.1
Element » Synapse » Version: 1.150.0

cpe:2.3:a:element:synapse:1.150.0
Element » Synapse » Version: 1.151.0

cpe:2.3:a:element:synapse:1.151.0
Element » Synapse » Version: 1.152.0

cpe:2.3:a:element:synapse:1.152.0
Element » Synapse » Version: 1.2.0

cpe:2.3:a:element:synapse:1.2.0
Element » Synapse » Version: 1.2.1

cpe:2.3:a:element:synapse:1.2.1
Element » Synapse » Version: 1.3.0

cpe:2.3:a:element:synapse:1.3.0
Element » Synapse » Version: 1.3.1

cpe:2.3:a:element:synapse:1.3.1
Element » Synapse » Version: 1.4.0

cpe:2.3:a:element:synapse:1.4.0
Element » Synapse » Version: 1.4.1

cpe:2.3:a:element:synapse:1.4.1
Element » Synapse » Version: 1.5.0

cpe:2.3:a:element:synapse:1.5.0
Element » Synapse » Version: 1.5.1

cpe:2.3:a:element:synapse:1.5.1
Element » Synapse » Version: 1.6.0

cpe:2.3:a:element:synapse:1.6.0
Element » Synapse » Version: 1.6.1

cpe:2.3:a:element:synapse:1.6.1
Element » Synapse » Version: 1.7.0

cpe:2.3:a:element:synapse:1.7.0
Element » Synapse » Version: 1.7.1

cpe:2.3:a:element:synapse:1.7.1
Element » Synapse » Version: 1.7.2

cpe:2.3:a:element:synapse:1.7.2
Element » Synapse » Version: 1.7.3

cpe:2.3:a:element:synapse:1.7.3
Element » Synapse » Version: 1.8.0

cpe:2.3:a:element:synapse:1.8.0
Element » Synapse » Version: 1.9.0

cpe:2.3:a:element:synapse:1.9.0
Element » Synapse » Version: 1.9.1

cpe:2.3:a:element:synapse:1.9.1

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Vulnerability Details CVE-2026-45078

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