CVE-2025-49090

State: Published
Severity: 7.1 High
Published: Oct 2, 2025
Updated: Oct 2, 2025
Reserved: May 31, 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.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L	mitre

Weaknesses

CWE-642 External Control of Critical State Data

Affected Products

Product	Versions
Matrix specificationMatrix	before 1.16Affected

References

https://matrix.org/blog/2025/08/security-release/
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/

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