What is CVE-2022-39374?

CVE-2022-39374 is a medium-severity vulnerability in Matrix Synapse, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2023-05-26.

How severe is CVE-2022-39374?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Matrix Synapse

CVE-2022-39374

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. If Synapse and a malicious homeserver are both joined to the same room, the malicious homeserver can trick Synapse into accepting previously r…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.009 (57.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Matrix Synapse
Matrix-org Synapse — versions >= 1.62.0, < 1.68.0

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
security-advisories@github.com

Frequently asked questions

What is CVE-2022-39374?: CVE-2022-39374 is a medium-severity vulnerability in Matrix Synapse, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2023-05-26.
How severe is CVE-2022-39374?: Medium severity. CVSS v3 base score is 6.5 out of 10.