Is CVE-2024-37302 actively exploited?

No active exploitation of CVE-2024-37302 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2024-37302 be exploited remotely?

Yes. CVE-2024-37302 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2024-37302?

CVE-2024-37302 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2024-37302

CWE-770Published: December 3, 2024· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2024-37302 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.