CVE catalog
CVE-2022-39254
python-matrix-nio: CVE-2022-39254
- Severity
- Medium
- Source
- [NVD] · [CVE record]
- EPSS
- 0.68% · Oct 25, 2026
matrix-nio is a Python Matrix client library, designed according to sans I/O principles. Prior to version 0.20, when a users requests a room key from their devices, the software correctly remember the request. Once they receive a forwarded room key, they accept it without checking who the room key came from. This allows homeservers to try to insert room keys of questionable validity, potentially mounting an impersonation attack. Version 0.20 fixes the issue.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | python-matrix-nio | sid | 0.25.2-2 | fixed |
| Debian | python-matrix-nio | forky | 0.25.2-2 | fixed |
| Debian | python-matrix-nio | trixie | 0.25.2-1 | fixed |
| Debian | python-matrix-nio | bookworm | 0.20.1-3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-matrix-nio | source | sid | 0.20.0-1 | not yet assigned | Not reported | Not reported |
| Debian | python-matrix-nio | source | forky | 0.20.0-1 | not yet assigned | Not reported | Not reported |
| Debian | python-matrix-nio | source | trixie | 0.20.0-1 | not yet assigned | Not reported | Not reported |
| Debian | python-matrix-nio | source | bookworm | 0.20.0-1 | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-matrix-nio]Fixed
Source package: [python-matrix-nio]
Details (2)
0.20.1-3· all · bookwormFixed · Fixed:
0.20.0-1dsa · python-matrix-nio · debian · bookworm
0.20.1-3· all · bookwormFixed · Fixed:
0.20.0-1dsa · python-matrix-nio · debian · bookworm
- [python3-matrix-nio-doc]Fixed
Source package: [python-matrix-nio]
Details (2)
0.20.1-3· all · bookwormFixed · Fixed:
0.20.0-1dsa · python-matrix-nio · debian · bookworm
0.20.1-3· all · bookwormFixed · Fixed:
0.20.0-1dsa · python-matrix-nio · debian · bookworm
Observed: