# Matrix vulnerabilities

Source: https://junglewise.ai/threats/vendors/matrix  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/matrix.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 7 vulnerabilities in Matrix: 1 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, vodozemac degraded secret zeroization in cryptographic libraries, was published on 6 November 2026. 1 vulnerability in the last four weeks, up from none in the four before.

## Counts

- Last 7 days: 1
- Last 30 days: 1
- Last 90 days: 2
- All time: 7 (0 critical, 0 exploited in the wild)

## About Matrix

Open standard for secure, decentralized real-time communication.

## Latest Matrix vulnerabilities

- [vodozemac degraded secret zeroization in cryptographic libraries](https://junglewise.ai/threats/rustsec-2026-0445-degraded-secret-zeroization-capabilities-1022d5f6) (info, published 6 Nov 2026)
- [CVE-2026-45056: Matrix Rust SDK sender spoofing in Olm-encrypted to-device messages](https://junglewise.ai/threats/cve-2026-45056-matrix-rust-sdk-sender-spoofing-in-olm-encrypted-to-device) (medium, CVSS 4, published 11 Sep 2026)
- [CVE-2025-66622: RUSTSEC-2025-0135 - matrix-sdk-base: Denial of service due to custom `m.room.join_rules` events](https://junglewise.ai/threats/cve-2025-66622-matrix-sdk-base-denial-of-service-via-custom-m-room-join-rules) (high, CVSS 7.5, published 9 Dec 2025)
- [CVE-2025-27146: Matrix IRC Bridge command injection in puppeted user](https://junglewise.ai/threats/cve-2025-27146-matrix-irc-bridge-command-injection-in-puppeted-user) (low, CVSS 3.1, published 25 Feb 2025)
- [CVE-2023-38700: Matrix AppService IRC information disclosure in event handling](https://junglewise.ai/threats/cve-2023-38700-matrix-appservice-irc-information-disclosure-in-event-handling) (low, CVSS 3.1, published 4 Aug 2023)
- [CVE-2023-28103: Matrix matrix-react-sdk prototype pollution](https://junglewise.ai/threats/cve-2023-28103-matrix-matrix-react-sdk-prototype-pollution) (low, CVSS 3.1, published 29 Mar 2023)
- [CVE-2022-39251: Matrix matrix-js-sdk user spoofing via protocol confusion](https://junglewise.ai/threats/cve-2022-39251-matrix-matrix-js-sdk-user-spoofing-via-protocol-confusion) (low, CVSS 3.1, published 30 Sep 2022)

## Most severe Matrix vulnerabilities

- [CVE-2025-66622: RUSTSEC-2025-0135 - matrix-sdk-base: Denial of service due to custom `m.room.join_rules` events](https://junglewise.ai/threats/cve-2025-66622-matrix-sdk-base-denial-of-service-via-custom-m-room-join-rules) (high, CVSS 7.5, published 9 Dec 2025)
- [CVE-2026-45056: Matrix Rust SDK sender spoofing in Olm-encrypted to-device messages](https://junglewise.ai/threats/cve-2026-45056-matrix-rust-sdk-sender-spoofing-in-olm-encrypted-to-device) (medium, CVSS 4, published 11 Sep 2026)
- [CVE-2022-39251: Matrix matrix-js-sdk user spoofing via protocol confusion](https://junglewise.ai/threats/cve-2022-39251-matrix-matrix-js-sdk-user-spoofing-via-protocol-confusion) (low, CVSS 3.1, published 30 Sep 2022)
- [CVE-2023-28103: Matrix matrix-react-sdk prototype pollution](https://junglewise.ai/threats/cve-2023-28103-matrix-matrix-react-sdk-prototype-pollution) (low, CVSS 3.1, published 29 Mar 2023)
- [CVE-2023-38700: Matrix AppService IRC information disclosure in event handling](https://junglewise.ai/threats/cve-2023-38700-matrix-appservice-irc-information-disclosure-in-event-handling) (low, CVSS 3.1, published 4 Aug 2023)
- [CVE-2025-27146: Matrix IRC Bridge command injection in puppeted user](https://junglewise.ai/threats/cve-2025-27146-matrix-irc-bridge-command-injection-in-puppeted-user) (low, CVSS 3.1, published 25 Feb 2025)
- [vodozemac degraded secret zeroization in cryptographic libraries](https://junglewise.ai/threats/rustsec-2026-0445-degraded-secret-zeroization-capabilities-1022d5f6) (info, published 6 Nov 2026)

## Vulnerabilities per week

1 vulnerability in the last four weeks, up from none in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 1 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 1 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Matrix vulnerabilities", https://junglewise.ai/threats/vendors/matrix, 9 November 2026.