Critical severity9.8NVD Advisory· Published Nov 8, 2019· Updated Jun 17, 2026
CVE-2019-18835
CVE-2019-18835
Description
Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. Events sent over /send_join, /send_leave, and /invite may not be correctly signed, or may not come from the expected servers.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
matrix-synapsePyPI | < 1.5.0 | 1.5.0 |
Affected products
1Patches
Vulnerability mechanics
References
6- github.com/matrix-org/synapse/pull/6262nvdPatchThird Party AdvisoryWEB
- github.com/advisories/GHSA-cppw-2mf8-qpm5ghsaADVISORY
- github.com/matrix-org/synapse/releases/tag/v1.5.0nvdRelease NotesThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2019-18835ghsaADVISORY
- github.com/matrix-org/synapse/commit/172f264ed38e8bef857552f93114b4ee113a880bghsaWEB
- github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2019-186.yamlghsaWEB
News mentions
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