Vulnerability · Published Oct 2, 2025 · Assigned by mitre
CVE-2025-49090
High 7.1
In plain English
A high-severity security flaw in Matrix specification from Matrix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.5%top 58.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.22 | synapse | 1.135.1-r0 | ALPINE-CVE-2025-49090 |
| Alpine:v3.23 | synapse | 1.135.1-r0 | ALPINE-CVE-2025-49090 |
| Alpine:v3.24 | synapse | 1.135.1-r0 | ALPINE-CVE-2025-49090 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Matrix | Matrix specification | 0 – before 1.16 |
Weakness: CWE-642 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L