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TI-2021-10166 Aliases CVE-2021-29453

Denial of service through memory exhaustion

Priority LOW 31CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.

Summary

matrix-media-repo is an open-source multi-domain media repository for Matrix. Versions 1.2.6 and earlier of matrix-media-repo do not properly handle malicious images which are crafted to be small in file size, but large in complexity. A malicious user could upload a relatively small image in terms of file size, using particular image formats, which expands to have extremely large dimensions during the process of thumbnailing. The server can be exhausted of memory in the process of trying to load the whole image into memory for thumbnailing, leading to denial of service. Version 1.2.7 has a fix for the vulnerability.

Why it matters now

EPSS 0.01002 63rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
turt2livematrix-media-repoup to 1.2.6—No fix listedCNA
  • matrix-media-repo Vendorturt2live Affected up to 1.2.6 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:matrix-media-repo_project:matrix-media-repo:*:*:*:*:*:*:*:*before 1.2.7VulnerableMatrix-media-repo Project
  • cpe:2.3:a:matrix-media-repo_project:matrix-media-repo:*:*:*:*:*:*:*:* Versions before 1.2.7 Vulnerable ·Matrix-media-repo Project

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-29453

References

Patch 1

Advisory 2

  • TI-2023-21918 Unsafe media served inline on download endpoints in matrix-media-repo CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences