{"cve":"CVE-2023-29529","nvd":{"published":"2023-04-14T19:15:09.400","modified":"2026-06-17T05:50:28.423","status":"Modified","description":"matrix-js-sdk is the Matrix Client-Server SDK for JavaScript and TypeScript. An attacker present in a room where an MSC3401 group call is taking place can eavesdrop on the video and audio of participants using matrix-js-sdk, without their knowledge. To affected matrix-js-sdk users, the attacker will not appear to be participating in the call. This attack is possible because matrix-js-sdk's group call implementation accepts incoming direct calls from other users, even if they have not yet declared intent to participate in the group call, as a means of resolving a race condition in call setup. Affected versions do not restrict access to the user's outbound media in this case. Legacy 1:1 calls are unaffected. This is fixed in matrix-js-sdk 24.1.0. As a workaround, users may hold group calls in private rooms where only the exact users who are expected to participate in the call are present.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-862"],"references":["https://github.com/matrix-org/matrix-js-sdk/releases/tag/v24.1.0","https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6g67-q39g-r79q","https://github.com/matrix-org/matrix-spec-proposals/pull/3401","https://github.com/matrix-org/matrix-js-sdk/releases/tag/v24.1.0","https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-6g67-q39g-r79q"],"products":["matrix:javascript_sdk"],"source":"nvd","synced_at":"2026-10-19T21:38:05.473481323+00:00"},"epss":{"cve":"CVE-2023-29529","score":0.00543,"percentile":0.45619,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-6g67-q39g-r79q","url":"https://osv.dev/vulnerability/GHSA-6g67-q39g-r79q","summary":"matrix-js-sdk vulnerable to invisible eavesdropping in group calls","modified":"2026-09-10T03:49:53.562127511Z","packages":[{"ecosystem":"npm","name":"matrix-js-sdk","purl":"pkg:npm/matrix-js-sdk","ranges":["<24.1.0"],"fixed":["24.1.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}