Description
Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix. MMR makes requests to other servers as part of normal operation, and these resource owners can return large amounts of JSON back to MMR for parsing. In parsing, MMR can consume large amounts of memory and exhaust available memory. This is fixed in MMR v1.3.8. Users are advised to upgrade. For users unable to upgrade; forward proxies can be configured to block requests to unsafe hosts. Alternatively, MMR processes can be configured with memory limits and auto-restart. Running multiple MMR processes concurrently can help ensure a restart does not overly impact users.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| t2bot | matrix-media-repo | < 1.3.8 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | govulncheck-vulndb | 0.0.20250128T150132-150000.1.29.1 | SUSE-SU-2025:0297-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | govulncheck-vulndb | 0.0.20250117T214834-1.1 | openSUSE-SU-2025:14704-1 |
| openSUSE Leap 15.6 | govulncheck-vulndb | 0.0.20250128T150132-150000.1.29.1 | SUSE-SU-2025:0297-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/t2bot/matrix-media-repo | < 1.3.8 | 1.3.8 | GHSA-gp86-q8hg-fpxj |
Advisories 2
- SUSE-SU-2025:0297-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Feb 5, 2026
- openSUSE-SU-2025:14704-1 govulncheck-vulndb-0.0.20250117T214834-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026