CVE-2019-18835
HIGH8.6EPSS 0.19%Improper Verification of Cryptographic Signature in matrix-synapse
Published: 5/24/2022Modified: 5/20/2026
Also known as:DEBIAN-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.
Affected packages (3)
- Debian/matrix-synapsefrom 0, < 1.5.0-1
- PyPI/matrix-synapsefrom 0, < 1.5.0
- PyPI/matrix-synapsefrom 0, < 1.5.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L |
References (8)
- ADVISORYhttps://github.com/advisories/GHSA-cppw-2mf8-qpm5
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2019-18835
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2019-18835
- PATCHhttps://github.com/matrix-org/synapse
- WEBhttps://github.com/matrix-org/synapse/commit/172f264ed38e8bef857552f93114b4ee113a880b
- WEBhttps://github.com/matrix-org/synapse/pull/6262
- WEBhttps://github.com/matrix-org/synapse/releases/tag/v1.5.0
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2019-186.yaml