PYSEC-2026-843
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/matrix-sydent/PYSEC-2026-843.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-843
- Aliases
- Published
- 2026-07-06T08:03:28.015702Z
- Modified
- 2026-07-07T11:46:05.809734259Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- Matrix Sydent mishandles emails
- Details
-
util/emailutils.py in Matrix Sydent before 1.0.2 mishandles registration restrictions that are based on e-mail domain, if the allowedlocal3pids option is enabled. This occurs because of potentially unwanted behavior in Python, in which an email.utils.parseaddr call on user@bad.example.net@good.example.com returns the user@bad.example.net substring.
- References
-
- https://nvd.nist.gov/vuln/detail/CVE-2019-11340
- https://github.com/matrix-org/sydent/commit/4e1cfff53429c49c87d5c457a18ed435520044fc
- https://github.com/matrix-org/sydent/compare/7c002cd...09278fb
- https://matrix.org/blog/2019/04/18/security-update-sydent-1-0-2
- https://twitter.com/matrixdotorg/status/1118934335963500545
- https://pypi.org/project/matrix-sydent
- https://github.com/advisories/GHSA-q9h8-gpw5-c95c
Affected packages
PyPI / matrix-sydent
Package
- Name
- matrix-sydent
- View open source insights on deps.dev
- Purl
- pkg:pypi/matrix-sydent