{"id":"CVE-2023-28103","aliases":["GHSA-6g43-88cp-w5gv"],"url":"https://o3.security/vulnerability/CVE-2023-28103","summary":"Prototype pollution in matrix-react-sdk","details":"### Impact\nIn certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the `Object.prototype`, disrupting matrix-react-sdk functionality, causing denial of service and potentially affecting program logic.\n\n(This is part 2, where [CVE-2022-36060](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-36060) / [GHSA-2x9c-qwgf-94xr](https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-2x9c-qwgf-94xr) is part 1. Part 2 covers remaining vectors not covered by part 1, found in a codebase audit scheduled after part 1.)\n\n### Patches\nThis is fixed in matrix-react-sdk 3.69.0\n\n### Workarounds\nNone.\n\n### References\n\n- [Release blog post](https://matrix.org/blog/2023/03/28/security-releases-matrix-js-sdk-24-0-0-and-matrix-react-sdk-3-69-0)\n- The advisory [GHSA-2x9c-qwgf-94xr](https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-2x9c-qwgf-94xr) ([CVE-2022-36060](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-36060)) refers to an initial set of vulnerable locations discovered and patched in matrix-react-sdk 3.53.0. We opted not to disclose that advisory while we performed an audit of the codebase and are now disclosing it jointly with this one.\n\n### For more information\nIf you have any questions or comments about this advisory please email us at [security at matrix.org](mailto:security@matrix.org).","published":"2023-03-28T20:37:24.288Z","modified":"2026-08-12T03:51:39.971139010Z","cvss":{"score":8.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},"epss":{"score":0.00712,"percentile":0.50524,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"matrix-react-sdk","fixedVersion":"3.69.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28103.json"},{"type":"ADVISORY","url":"https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-6g43-88cp-w5gv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28103"},{"type":"ARTICLE","url":"https://matrix.org/blog/2023/03/28/security-releases-matrix-js-sdk-24-0-0-and-matrix-react-sdk-3-69-0"},{"type":"WEB","url":"https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-2x9c-qwgf-94xr"},{"type":"PACKAGE","url":"https://github.com/matrix-org/matrix-react-sdk"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:39.971139010Z"}}