{"id":"CVE-2023-28103","aliases":["ALPINE-CVE-2023-28103","EUVD-2023-0903","GHSA-6g43-88cp-w5gv"],"status":"published","title":"Prototype pollution in matrix-react-sdk","description":"matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In 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. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00712,"percentile":0.53877,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321"],"published":"2023-03-28T20:37:24Z","modified":"2026-11-03T06:32:42Z","fixes":[{"ecosystem":"npm","package":"matrix-react-sdk","fixed_in":["3.69.0"],"sources":["ghsa","osv"]},{"ecosystem":"Alpine:v3.18","package":"element-web","fixed_in":["1.11.26-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"element-web","fixed_in":["1.11.26-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"element-web","fixed_in":["1.11.26-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"element-web","fixed_in":["1.11.26-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"element-web","fixed_in":["1.11.26-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"element-web","fixed_in":["1.11.26-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"element-web","fixed_in":["1.11.26-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"riot-web","fixed_in":["1.11.26-r0"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"matrix-react-sdk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.69.0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"element-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.26-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"element-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.26-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"element-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.26-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"element-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.26-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"element-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.26-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"element-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.26-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"element-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.26-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"riot-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.26-r0"}]}]},{"source":"osv","ecosystem":"npm","package":"matrix-react-sdk","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.69.0"}]}]}],"products":[{"vendor":"matrix-org","product":"matrix-react-sdk"},{"vendor":"matrix-react-sdk_project","product":"matrix-react-sdk"}],"references":[{"url":"https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-6g43-88cp-w5gv","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://matrix.org/blog/2023/03/28/security-releases-matrix-js-sdk-24-0-0-and-matrix-react-sdk-3-69-0","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","article","web"]},{"url":"https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-2x9c-qwgf-94xr","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28103","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-6g43-88cp-w5gv"},{"url":"https://security.alpinelinux.org/vuln/CVE-2023-28103","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28103.json","tags":["advisory"]},{"url":"https://github.com/matrix-org/matrix-react-sdk","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-28103","title":"Prototype pollution in matrix-react-sdk","description":"matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In 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. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.","status":"published","published":"2023-03-28T20:37:24.288Z","modified":"2025-02-18T17:26:55.589Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:35:32.376766Z"}],"euvd":[{"id":"EUVD-2023-0903","description":"matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In 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. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.","status":"published","published":"2023-03-28T20:37:24Z","modified":"2025-02-18T17:26:55Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"updated_at":"2026-11-02T20:53:28.952595Z"}],"ghsa":[{"id":"GHSA-6g43-88cp-w5gv","title":"Prototype pollution in matrix-react-sdk ","description":"### 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).","status":"published","published":"2023-03-29T19:34:25Z","modified":"2023-03-29T19:34:28Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:36:48.905887Z"}],"nvd":[{"id":"CVE-2023-28103","description":"matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In 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. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.","status":"published","published":"2023-03-28T21:15:10.887Z","modified":"2026-06-17T05:46:52.69Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:07:51.883939Z"}],"osv":[{"id":"ALPINE-CVE-2023-28103","description":"matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In 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. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.","status":"published","published":"2023-03-28T21:15:10.887Z","modified":"2026-11-03T06:32:42.506504855Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"updated_at":"2026-11-03T07:17:02.90744Z"},{"id":"CVE-2023-28103","title":"Prototype pollution in matrix-react-sdk","description":"matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In 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. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.","status":"published","published":"2023-03-28T20:37:24.288Z","modified":"2026-10-28T02:31:12.709858253Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:44:31.135751Z"},{"id":"GHSA-6g43-88cp-w5gv","title":"Prototype pollution in matrix-react-sdk ","description":"### 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).","status":"published","published":"2023-03-29T19:34:25Z","modified":"2026-09-10T03:49:52.704830765Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:46:39.618611Z"}]}}