CVE-2025-49090

Impact

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

Affected products

Versions were read from the advisory text. No structured product data has been published for this record yet.

Weakness classification

References

• NVD record
• CVE.org record
• 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/