{"id":"CVE-2026-28403","aliases":["EUVD-2026-9200","GHSA-wr3v-x247-337w"],"status":"published","title":"Textream Cross-Site WebSocket Hijacking (CSWSH) vulnerability","description":"Textream is a free macOS teleprompter app. Prior to version 1.5.1, the `DirectorServer` WebSocket server (`ws://127.0.0.1:\u003chttpPort+1\u003e`) accepts connections from any origin without validating the HTTP `Origin` header during the WebSocket handshake. A malicious web page visited in the same browser session can silently connect to the local WebSocket server and send arbitrary `DirectorCommand` payloads, allowing full remote control of the teleprompter content. Version 1.5.1 fixes the issue.","severity":{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00169,"percentile":0.06263,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-346"],"published":"2026-03-02T15:45:18Z","modified":"2026-10-28T02:31:13Z","products":[{"vendor":"f","product":"textream"},{"vendor":"fka","product":"textream"}],"references":[{"url":"https://github.com/f/textream/security/advisories/GHSA-wr3v-x247-337w","tags":["x_refsource_CONFIRM","Exploit","Mitigation","Vendor Advisory","advisory"]},{"url":"https://github.com/f/textream/commit/f5ebad82750b9313386c34af8f0ede50c213a8a0","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28403.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28403","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-28403","title":"Textream Cross-Site WebSocket Hijacking (CSWSH) vulnerability","description":"Textream is a free macOS teleprompter app. Prior to version 1.5.1, the `DirectorServer` WebSocket server (`ws://127.0.0.1:\u003chttpPort+1\u003e`) accepts connections from any origin without validating the HTTP `Origin` header during the WebSocket handshake. A malicious web page visited in the same browser session can silently connect to the local WebSocket server and send arbitrary `DirectorCommand` payloads, allowing full remote control of the teleprompter content. Version 1.5.1 fixes the issue.","status":"published","published":"2026-03-02T15:45:18.206Z","modified":"2026-03-02T19:27:12.422Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T14:20:02.290587Z"}],"euvd":[{"id":"EUVD-2026-9200","description":"Textream is a free macOS teleprompter app. Prior to version 1.5.1, the `DirectorServer` WebSocket server (`ws://127.0.0.1:\u003chttpPort+1\u003e`) accepts connections from any origin without validating the HTTP `Origin` header during the WebSocket handshake. A malicious web page visited in the same browser session can silently connect to the local WebSocket server and send arbitrary `DirectorCommand` payloads, allowing full remote control of the teleprompter content. Version 1.5.1 fixes the issue.","status":"published","published":"2026-03-02T15:45:18Z","modified":"2026-03-02T19:27:12Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T19:48:12.668624Z"}],"nvd":[{"id":"CVE-2026-28403","description":"Textream is a free macOS teleprompter app. Prior to version 1.5.1, the `DirectorServer` WebSocket server (`ws://127.0.0.1:\u003chttpPort+1\u003e`) accepts connections from any origin without validating the HTTP `Origin` header during the WebSocket handshake. A malicious web page visited in the same browser session can silently connect to the local WebSocket server and send arbitrary `DirectorCommand` payloads, allowing full remote control of the teleprompter content. Version 1.5.1 fixes the issue.","status":"published","published":"2026-03-02T16:16:25.75Z","modified":"2026-06-17T10:28:33.56Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L","level":"high","assessor":"primary"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T14:12:07.420927Z"}],"osv":[{"id":"CVE-2026-28403","title":"Textream Cross-Site WebSocket Hijacking (CSWSH) vulnerability","description":"Textream is a free macOS teleprompter app. Prior to version 1.5.1, the `DirectorServer` WebSocket server (`ws://127.0.0.1:\u003chttpPort+1\u003e`) accepts connections from any origin without validating the HTTP `Origin` header during the WebSocket handshake. A malicious web page visited in the same browser session can silently connect to the local WebSocket server and send arbitrary `DirectorCommand` payloads, allowing full remote control of the teleprompter content. Version 1.5.1 fixes the issue.","status":"published","published":"2026-03-02T15:45:18.206Z","modified":"2026-10-28T02:31:13.937655384Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L","level":"high"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T15:45:00.180685Z"}]}}