CVE-2025-49090

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

02/10/2025

Last modified:

06/10/2025

Description

The Matrix specification before 1.16 (i.e., with a room version before 12 and State Resolution before 2.1) has deficient state resolution.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): High
Availability (A): Low

Base Score 3.x

7.10

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

https://github.com/Nheko-Reborn/nheko/issues/1931
https://github.com/matrix-org/matrix-spec/releases/tag/v1.16
https://matrix.org/blog/2025/08/project-hydra-improving-state-res/
https://matrix.org/blog/2025/08/security-release/