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GHSA-wchh-9x6h-7f6p

Published Jul 29, 2026·Last modified Jul 29, 2026
Affected Components(0)

No affected components available

Description

Problem

Multiple vulnerabilities were disclosed in 2024 affecting libolm (Olm): AES timing / side‑channel, Ed25519 signature malleability, and timing leaks in base64 decoding; several CVEs were assigned. Patches and mitigations were published; maintainers recommend upgrading to fixed versions. In addition, a 2022 “Olm/Megolm protocol confusion” advisory affecting some SDKs was critical and required client-side fixes. Use patched versions of libolm and up-to-date Matrix SDKs; avoid unpatched clients/servers.

Olm is a dependency of matrix-commander (Python version, not Rust version).

WARNING:

Due to cryptographic olm dependency deprecation, this program is cryptographically unsafe to use until https://github.com/matrix-nio/matrix-nio/pull/555 is merged. Good news: https://github.com/8go/matrix-commander-rs is a Rust alternative not having this issue.

References

  • CVE-2022-39255
  • CVE-2024-45193
  • https://soatok.blog/2024/08/14/security-issues-in-matrixs-olm-library/
  • https://nvd.nist.gov/nvd.cfm?cvename=CVE-2024-45193
  • https://github.com/matrix-org/matrix-ios-sdk/security/advisories/GHSA-hw6g-j8v6-9hcm

Workarounds

  • use the Rust version: https://github.com/8go/matrix-commander-rs

Severity:

Medium

CVE-2022-39255 — MEDIUM (NVD/MITRE lists CVSS base score 5.x — treated as Medium).

CVE-2024-45193 — MEDIUM (NVD shows CVSS 3.1 base score ~4.3 — Medium)

Risk Scores
Base Score
0.0

Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.

Threat Intelligence
0.0

No exploitation activity has been observed at this time. Continue routine monitoring.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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