CVE-2024-45193: Matrix Olm

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in Matrix libolm through 3.2.16. There is Ed25519 signature malleability due to lack of validation criteria (does not ensure that S < n). This refers to the libolm implementation of Olm. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Affected products

• Matrix Olm: up to and including 3.2.16

Published 2024-08-22. Last modified 2026-06-17.