{"id":"GHSA-wchh-9x6h-7f6p","aliases":[],"url":"https://o3.security/vulnerability/GHSA-wchh-9x6h-7f6p","summary":"olm dependency deprecation: CVE-2022-39255 and CVE-2024-45193","details":"### Problem\n\nMultiple 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.\n\nOlm is a dependency of `matrix-commander` (Python version, not Rust version).\n\nWARNING:\n\nDue to cryptographic [olm dependency deprecation](https://github.com/8go/matrix-commander/issues/204#issuecomment-3523986979), 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.\n\n\n### References\n- CVE-2022-39255\n- CVE-2024-45193\n- https://soatok.blog/2024/08/14/security-issues-in-matrixs-olm-library/\n- https://nvd.nist.gov/nvd.cfm?cvename=CVE-2024-45193\n- https://github.com/matrix-org/matrix-ios-sdk/security/advisories/GHSA-hw6g-j8v6-9hcm\n\n### Workarounds\n- use the Rust version: https://github.com/8go/matrix-commander-rs \n\n### Severity:\n\nMedium\n\nCVE-2022-39255 — MEDIUM (NVD/MITRE lists CVSS base score 5.x — treated as Medium).\n\nCVE-2024-45193 — MEDIUM (NVD shows CVSS 3.1 base score ~4.3 — Medium)","published":"2026-07-29T16:11:45Z","modified":"2026-07-29T16:15:29.829001194Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"matrix-commander","fixedVersion":null}],"fix":{"url":"https://github.com/matrix-nio/matrix-nio/pull/555","label":"matrix-nio/matrix-nio#555"},"references":[{"type":"WEB","url":"https://github.com/8go/matrix-commander/security/advisories/GHSA-wchh-9x6h-7f6p"},{"type":"WEB","url":"https://github.com/8go/matrix-commander/issues/204#issuecomment-3523986979"},{"type":"WEB","url":"https://github.com/matrix-nio/matrix-nio/pull/555"},{"type":"WEB","url":"https://github.com/matrix-nio/matrix-nio/commit/71a1c808bc2ae6ea2a6e8effa7c11bd09796c626"},{"type":"PACKAGE","url":"https://github.com/8go/matrix-commander"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-29T16:15:29.829001194Z"}}