Vulnerability · Published Sep 28, 2022 · Assigned by GitHub_M
CVE-2022-39264nheko vulnerable to secret poisoning using MITM on secret requests by the homeserver
High 8.6
In plain English
A high-severity improper certificate validation in nheko from Nheko-Reborn. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
nheko is a desktop client for the Matrix communication application. All versions below 0.10.2 are vulnerable homeservers inserting malicious secrets, which could lead to man-in-the-middle attacks. Users can upgrade to version 0.10.2 to protect against this issue. As a workaround, one may apply the patch manually, avoid doing verifications of one's own devices, and/or avoid pressing the request button in the settings menu.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | nheko | 0.10.2-1 | DEBIAN-CVE-2022-39264 |
| Debian:13 | nheko | 0.10.2-1 | DEBIAN-CVE-2022-39264 |
| Debian:14 | nheko | 0.10.2-1 | DEBIAN-CVE-2022-39264 |
| Ubuntu:22.04:LTS | nheko | no fix listed | UBUNTU-CVE-2022-39264 |
| Ubuntu:24.04:LTS | nheko | no fix listed | UBUNTU-CVE-2022-39264 |
| Ubuntu:25.10 | nheko | no fix listed | UBUNTU-CVE-2022-39264 |
| Ubuntu:26.04:LTS | nheko | no fix listed | UBUNTU-CVE-2022-39264 |
| Ubuntu:26.10 | nheko | no fix listed | UBUNTU-CVE-2022-39264 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Nheko-Reborn | nheko | < 0.10.2 |
Weakness: CWE-295, CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N