PatchTheCVECVE-2024-36403: Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix
CVE-2024-36403 is a medium-severity flaw (CVSS 5.3) affecting matrix-media-repo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix. MMR before version 1.3.5 is vulnerable to unbounded disk consumption, where an unauthenticated adversary can induce it to download and cache large amounts of remote media files. MMR's typical operating environment uses S3-like storage as a backend, with file-backed store as an alternative option. Instances using a file-backed store or those which self-h
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.7% (top 47%) |
| CISA exploited list | No |
| Weakness | CWE-770 |
| Published | 2025-01-16 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2024-36403?
matrix-media-repo: upgrade to 1.3.5. Exact commands for each OS are on this page.
Is CVE-2024-36403 being exploited?
CVE-2024-36403 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2024-36403 affect?
CVE-2024-36403 affects matrix-media-repo. Severity is medium (CVSS 5.3). Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix. MMR before version 1.3.5 is vulnerable to unbounded disk consumption, where an unauthenticated adversary can induce it to download and cache larg
How urgent is CVE-2024-36403?
Priority 37/100. Remotely exploitable, no login, no user action
Related CVEs
- CVE-2024-56515 MEDIUM 6.8 UPGRADE Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix
- CVE-2024-52791 MEDIUM 5.3 UPGRADE Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix
- CVE-2024-52602 MEDIUM 5.0 UPGRADE Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix
- CVE-2024-36402 MEDIUM 5.3 UPGRADE Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix