{"id":"CVE-2024-47824","aliases":["GHSA-qcvh-p9jq-wp8v"],"url":"https://o3.security/vulnerability/CVE-2024-47824","summary":"Malicious homeservers can steal message keys when the matrix-react-sdk user invites another user to a room","details":"### Impact\n\nmatrix-react-sdk before 3.102.0 allows a malicious homeserver to potentially steal message keys for a room when a user invites another user to that room, via injection of a malicious device controlled by the homeserver. This is possible because matrix-react-sdk before 3.102.0 shared historical message keys on invite.\n\n### Patches\n\nmatrix-react-sdk 3.102.0 [disables sharing message keys on invite](https://github.com/matrix-org/matrix-react-sdk/pull/12618) by removing calls to the vulnerable functionality.\n\n### Workarounds\n\nNone.\n\n### References\n\nThe vulnerability in matrix-react-sdk is caused by calling `MatrixClient.sendSharedHistoryKeys` in matrix-js-sdk, which is inherently vulnerable to this sort of attack. This matrix-js-sdk vulnerability is tracked as CVE-2024-47080 / [GHSA-4jf8-g8wp-cx7c](https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-4jf8-g8wp-cx7c). Given that this functionality is not specific to sharing message keys on *invite*, is optional, has to be explicitly called by the caller and has been independently patched in matrix-react-sdk by removing the offending calls, we believe it is proper to treat the matrix-react-sdk vulnerability as a separate one, with its own advisory and CVE.\n\nThe matrix-org/matrix-react-sdk repository has recently been archived and the project was moved to [element-hq/matrix-react-sdk](https://github.com/element-hq/matrix-react-sdk). Given that this happened *after* the first patched release, no releases of the project on [element-hq/matrix-react-sdk](https://github.com/element-hq/matrix-react-sdk) were ever vulnerable to this vulnerability.\n\nPatching pull request: https://github.com/matrix-org/matrix-react-sdk/pull/12618.\n\n### For more information\n\nIf you have any questions or comments about this advisory, please email us at security at [security at matrix.org](mailto:security@matrix.org).\n","published":"2024-10-15T15:40:37.397Z","modified":"2026-10-28T02:30:24.842683481Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"matrix-react-sdk","fixedVersion":"3.102.0"}],"fix":{"url":"https://github.com/matrix-org/matrix-react-sdk/commit/6fc9d7641c51ca3db8225cf58b9d6e6fdd2d6556","label":"matrix-org/matrix-react-sdk@6fc9d76"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/47xxx/CVE-2024-47824.json"},{"type":"ADVISORY","url":"https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-qcvh-p9jq-wp8v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-47824"},{"type":"FIX","url":"https://github.com/matrix-org/matrix-react-sdk/commit/6fc9d7641c51ca3db8225cf58b9d6e6fdd2d6556"},{"type":"FIX","url":"https://github.com/matrix-org/matrix-react-sdk/pull/12618"},{"type":"PACKAGE","url":"https://github.com/matrix-org/matrix-react-sdk"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:24.842683481Z"}}