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Advisory record · GHSA-fh66-fcv5-jjfr

Synapse's invalid device keys degrade federation functionality

CVSS 5.3 MediumEPSS 0.0048 · 41st percentile

Published by the GitHub Advisory Database at 8 Oct 2025, 17:51 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
matrix-synapsePyPI<1.138.3 || >=1.139.0rc2, <1.139.11.138.3, 1.139.1
Identifiers
GHSA-fh66-fcv5-jjfr · CVE-2025-61672 · PYSEC-2026-1612
Weakness (CWE)
CWE-1287
Tags
Published
8 Oct 2025
Updated
7 Jul 2026

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.3 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0048, the 41st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 8 Oct 2025. New records show when each source confirmed them.

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.