PYSEC-2026-194
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/matrix-synapse/PYSEC-2026-194.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-194
- Aliases
- Published
- 2026-05-28T17:16:31Z
- Modified
- 2026-06-05T12:45:16Z
- Severity
-
- 2.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
- Summary
- [none]
- Details
-
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 from providing full history to paginating clients. Clients could therefore fail to display room history. This vulnerability is fixed in 1.152.1.
- References
Affected packages
PyPI / matrix-synapse
Package
- Name
- matrix-synapse
- View open source insights on deps.dev
- Purl
- pkg:pypi/matrix-synapse
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed1.152.1
Affected versions
0.*
0.33.5
0.33.5.1
0.33.6rc1
0.33.6
0.33.7rc1
0.33.7rc2
0.33.7
0.33.8rc2
0.33.8
0.33.9
0.34.0rc1
0.34.0rc2
0.34.0
0.34.0.1
0.34.1.1
0.99.0rc1
0.99.0rc2
0.99.0rc3
0.99.0rc4
0.99.0
0.99.1rc1
0.99.1rc2
0.99.1
0.99.1.1
0.99.2rc1
0.99.2
0.99.3rc1
0.99.3
0.99.3.1
0.99.3.2
0.99.4rc1
0.99.4
0.99.5rc1
0.99.5
0.99.5.1
0.99.5.2
1.*
1.0.0rc1
1.0.0rc2
1.0.0rc3
1.0.0
1.1.0rc1
1.1.0rc2
1.1.0
1.2.0rc1
1.2.0rc2
1.2.0
1.2.1
1.3.0rc1
1.3.0
1.3.1
1.4.0rc1
1.4.0rc2
1.4.0
1.4.1rc1
1.4.1
1.5.0rc1
1.5.0rc2
1.5.0
1.5.1
1.6.0rc1
1.6.0rc2
1.6.0
1.6.1
1.7.0rc1
1.7.0rc2
1.7.0
1.7.1
1.7.2
1.7.3
1.8.0rc1
1.8.0
1.9.0.dev1
1.9.0.dev2
1.9.0rc1
1.9.0
1.9.1
1.10.0rc1
1.10.0rc2
1.10.0rc3
1.10.0rc5
1.10.0
1.10.1
1.11.0rc1
1.11.0
1.11.1
1.12.0rc1
1.12.0
1.12.1rc1
1.12.1
1.12.2
1.12.3
1.12.4rc1
1.12.4
1.13.0rc1
1.13.0rc2
1.13.0rc3
1.13.0
1.14.0rc1
1.14.0rc2
1.14.0
1.15.0rc1
1.15.0
1.15.1
1.15.2
1.16.0rc1
1.16.0rc2
1.16.0
1.16.1
1.17.0rc1
1.17.0
1.18.0rc1
1.18.0rc2
1.18.0
1.19.0rc1
1.19.0
1.19.1rc1
1.19.1
1.19.2
1.19.3
1.20.0rc1
1.20.0rc2
1.20.0rc3
1.20.0rc4
1.20.0rc5
1.20.0
1.20.1
1.21.0rc1
1.21.0rc2
1.21.0rc3
1.21.0
1.21.1
1.21.2
1.22.0rc1
1.22.0rc2
1.22.0
1.22.1
1.23.0rc1
1.23.0
1.23.1
1.24.0rc1
1.24.0rc2
1.24.0
1.25.0rc1
1.25.0
1.26.0rc1
1.26.0rc2
1.26.0
1.27.0rc1
1.27.0rc2
1.27.0
1.28.0rc1
1.28.0
1.29.0rc1
1.29.0
1.30.0rc1
1.30.0
1.30.1
1.31.0rc1
1.31.0
1.32.0rc1
1.32.0
1.32.1
1.32.2
1.33.0rc1
1.33.0rc2
1.33.0
1.33.1
1.33.2
1.34.0rc1
1.34.0
1.35.0rc1
1.35.0rc2
1.35.0rc3
1.35.0
1.35.1
1.36.0rc1
1.36.0rc2
1.36.0
1.37.0rc1
1.37.0
1.37.1rc1
1.37.1
1.38.0rc1
1.38.0rc2
1.38.0rc3
1.38.0
1.38.1
1.39.0rc1
1.39.0rc2
1.39.0rc3
1.39.0
1.40.0rc1
1.40.0rc2
1.40.0rc3
1.40.0
1.41.0rc1
1.41.0
1.41.1
1.42.0rc1
1.42.0rc2
1.42.0
1.43.0rc1
1.43.0rc2
1.43.0
1.44.0rc1
1.44.0rc2
1.44.0rc3
1.44.0
1.45.0rc1
1.45.0rc2
1.45.0
1.45.1
1.46.0rc1
1.46.0
1.47.0rc1
1.47.0rc2
1.47.0rc3
1.47.0
1.47.1
1.48.0rc1
1.48.0
1.49.0rc1
1.49.0
1.49.2
1.50.0rc1
1.50.0rc2
1.50.0
1.50.1
1.50.2
1.51.0rc1
1.51.0rc2
1.51.0
1.52.0rc1
1.52.0
1.53.0rc1
1.53.0
1.54.0rc1
1.54.0
1.55.0rc1
1.55.0
1.55.1
1.55.2
1.56.0rc1
1.56.0
1.57.0rc1
1.57.0
1.57.1
1.58.0rc2
1.58.0
1.58.1
1.59.0rc1
1.59.0rc2
1.59.0
1.59.1
1.60.0rc1
1.60.0rc2
1.60.0
1.61.0rc1
1.61.0
1.61.1
1.62.0rc1
1.62.0rc2
1.62.0rc3
1.62.0
1.63.0rc1
1.63.0
1.63.1
1.64.0rc1
1.64.0rc2
1.64.0
1.65.0rc1
1.65.0rc2
1.65.0
1.66.0rc1
1.66.0rc2
1.66.0
1.67.0rc1
1.67.0
1.68.0rc1
1.68.0rc2
1.68.0
1.69.0rc1
1.69.0rc2
1.69.0rc4
1.69.0
1.70.0rc1
1.70.0rc2
1.70.0
1.70.1
1.71.0rc1
1.71.0rc2
1.71.0
1.72.0rc1
1.72.0
1.73.0rc2
1.73.0
1.74.0rc1
1.74.0
1.75.0rc1
1.75.0rc2
1.75.0
1.76.0rc1
1.76.0rc2
1.76.0
1.77.0rc1
1.77.0rc2
1.77.0
1.78.0rc1
1.78.0
1.79.0rc1
1.79.0rc2
1.79.0
1.80.0rc1
1.80.0rc2
1.80.0
1.81.0rc1
1.81.0rc2
1.81.0
1.82.0rc1
1.82.0
1.83.0rc1
1.83.0
1.84.0rc1
1.84.0
1.84.1
1.85.0rc1
1.85.0rc2
1.85.0
1.85.1
1.85.2
1.86.0rc2
1.86.0
1.87.0rc1
1.87.0
1.88.0rc1
1.88.0
1.89.0rc1
1.89.0
1.90.0rc1
1.90.0
1.91.0rc1
1.91.0
1.91.1
1.91.2
1.92.0rc1
1.92.1
1.92.2
1.92.3
1.93.0rc1
1.93.0
1.94.0rc1
1.94.0
1.95.0rc1
1.95.0
1.95.1
1.96.0rc1
1.96.1
1.97.0rc1
1.97.0
1.98.0rc1
1.98.0
1.99.0rc1
1.99.0
1.100.0rc2
1.100.0rc3
1.100.0
1.101.0rc1
1.101.0
1.102.0rc1
1.102.0
1.103.0rc1
1.103.0
1.104.0rc1
1.104.0
1.105.0rc1
1.105.0
1.105.1
1.106.0rc1
1.106.0
1.107.0rc1
1.107.0
1.108.0rc1
1.108.0
1.109.0rc1
1.109.0rc2
1.109.0rc3
1.109.0
1.110.0rc2
1.110.0rc3
1.110.0
1.111.0rc1
1.111.0rc2
1.111.0
1.111.1
1.112.0rc1
1.112.0
1.113.0rc1
1.113.0
1.114.0rc1
1.114.0rc3
1.114.0
1.115.0rc1
1.115.0rc2
1.115.0
1.116.0rc1
1.116.0rc2
1.116.0
1.117.0rc1
1.117.0
1.118.0rc1
1.118.0
1.119.0rc2
1.119.0
1.120.0rc1
1.120.0
1.120.2
1.121.0rc1
1.121.0
1.121.1
1.122.0rc1
1.122.0
1.123.0rc1
1.123.0
1.124.0rc1
1.124.0rc2
1.124.0rc3
1.124.0
1.125.0rc1
1.125.0
1.126.0rc2
1.126.0rc3
1.126.0
1.127.0rc1
1.127.0
1.127.1
1.128.0rc1
1.128.0
1.129.0rc2
1.129.0
1.130.0rc1
1.130.0
1.131.0rc1
1.131.0
1.132.0rc1
1.132.0
1.133.0rc1
1.133.0
1.134.0rc1
1.134.0
1.135.0rc1
1.135.0rc2
1.135.0
1.135.2
1.136.0rc1
1.136.0rc2
1.136.0
1.137.0rc1
1.137.0
1.138.0rc1
1.138.0
1.138.2
1.138.3
1.138.4
1.139.0rc2
1.139.0rc3
1.139.0
1.139.1
1.139.2
1.140.0rc1
1.140.0
1.141.0rc1
1.141.0rc2
1.141.0
1.142.0rc3
1.142.0rc4
1.142.0
1.142.1
1.143.0rc2
1.143.0
1.144.0rc1
1.144.0
1.145.0rc1
1.145.0rc2
1.145.0rc3
1.145.0rc4
1.145.0
1.146.0rc1
1.146.0
1.147.0rc1
1.147.0
1.147.1
1.148.0rc1
1.148.0
1.149.0rc1
1.149.0
1.149.1
1.150.0rc1
1.150.0
1.151.0rc1
1.151.0
1.152.0rc1
1.152.0