VulnerableCode Package Details - pkg:pypi/matrix-synapse@1.95.1

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Vulnerability	Summary	Fixed by
VCID-g7rm-55dm-tybk Aliases: CVE-2024-37302 GHSA-4mhg-xv73-xq2x PYSEC-2024-286	Synapse is an open-source Matrix homeserver. Synapse versions before 1.106 are vulnerable to a disk fill attack, where an unauthenticated adversary can induce Synapse to download and cache large amounts of remote media. The default rate limit strategy is insufficient to mitigate this. This can lead to a denial of service, ranging from further media uploads/downloads failing to completely unavailability of the Synapse process, depending on how Synapse was deployed. Synapse 1.106 introduces a new "leaky bucket" rate limit on remote media downloads to reduce the amount of data a user can request at a time. This does not fully address the issue, but does limit an unauthenticated user's ability to request large amounts of data to be cached.	1.106.0 Affected by 0 other vulnerabilities.
VCID-nmup-uep4-b7hw Aliases: CVE-2024-37303 GHSA-gjgr-7834-rhxr PYSEC-2024-287	Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository. Synapse 1.106 introduces a partial mitigation in the form of new endpoints which require authentication for media downloads. The unauthenticated endpoints will be frozen in a future release, closing the attack vector.	1.106.0 Affected by 0 other vulnerabilities.
VCID-ry9q-34p9-auh6 Aliases: CVE-2024-31208 GHSA-3h7q-rfh9-xm4v PYSEC-2024-50	Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service. Servers in private federations, or those that do not federate, are not affected. Server administrators should upgrade to 1.105.1 or later. Some workarounds are available. One can ban the malicious users or ACL block servers from the rooms and/or leave the room and purge the room using the admin API.	1.105.1 Affected by 2 other vulnerabilities. This version is affected by these other vulnerabilities: {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }}

Vulnerability

Summary

Fixed by

VCID-g7rm-55dm-tybk
Aliases:
CVE-2024-37302
GHSA-4mhg-xv73-xq2x
PYSEC-2024-286

Synapse is an open-source Matrix homeserver. Synapse versions before 1.106 are vulnerable to a disk fill attack, where an unauthenticated adversary can induce Synapse to download and cache large amounts of remote media. The default rate limit strategy is insufficient to mitigate this. This can lead to a denial of service, ranging from further media uploads/downloads failing to completely unavailability of the Synapse process, depending on how Synapse was deployed. Synapse 1.106 introduces a new "leaky bucket" rate limit on remote media downloads to reduce the amount of data a user can request at a time. This does not fully address the issue, but does limit an unauthenticated user's ability to request large amounts of data to be cached.

1.106.0
Affected by 0 other vulnerabilities.

VCID-nmup-uep4-b7hw
Aliases:
CVE-2024-37303
GHSA-gjgr-7834-rhxr
PYSEC-2024-287

Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository. Synapse 1.106 introduces a partial mitigation in the form of new endpoints which require authentication for media downloads. The unauthenticated endpoints will be frozen in a future release, closing the attack vector.

1.106.0
Affected by 0 other vulnerabilities.

VCID-ry9q-34p9-auh6
Aliases:
CVE-2024-31208
GHSA-3h7q-rfh9-xm4v
PYSEC-2024-50

Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service. Servers in private federations, or those that do not federate, are not affected. Server administrators should upgrade to 1.105.1 or later. Some workarounds are available. One can ban the malicious users or ACL block servers from the rooms and/or leave the room and purge the room using the admin API.

1.105.1
Affected by 2 other vulnerabilities.

Vulnerability	Summary	Aliases
VCID-tug1-g6m1-j3f3	Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver.	CVE-2023-43796 GHSA-mp92-3jfm-3575 PYSEC-2023-230

Vulnerability

Summary

Aliases

VCID-tug1-g6m1-j3f3

Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver.

CVE-2023-43796
GHSA-mp92-3jfm-3575
PYSEC-2023-230

Date	Actor	Action	Vulnerability	Source	VulnerableCode Version
2026-05-30T21:02:26.179771+00:00	GitLab Importer	Fixing	VCID-tug1-g6m1-j3f3	https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/matrix-synapse/CVE-2023-43796.yml	38.6.0
2026-05-30T20:35:54.484495+00:00	Pypa Importer	Affected by	VCID-nmup-uep4-b7hw	https://github.com/pypa/advisory-database/blob/main/vulns/matrix-synapse/PYSEC-2024-287.yaml	38.6.0
2026-05-30T20:35:52.830279+00:00	Pypa Importer	Affected by	VCID-g7rm-55dm-tybk	https://github.com/pypa/advisory-database/blob/main/vulns/matrix-synapse/PYSEC-2024-286.yaml	38.6.0
2026-05-30T20:34:22.278146+00:00	Pypa Importer	Affected by	VCID-ry9q-34p9-auh6	https://github.com/pypa/advisory-database/blob/main/vulns/matrix-synapse/PYSEC-2024-50.yaml	38.6.0
2026-05-30T20:33:12.374709+00:00	Pypa Importer	Fixing	VCID-tug1-g6m1-j3f3	https://github.com/pypa/advisory-database/blob/main/vulns/matrix-synapse/PYSEC-2023-230.yaml	38.6.0