CVE-2026-28403Textream Cross-Site WebSocket Hijacking (CSWSH) vulnerability
Updated under an hour ago ()
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It affects f textream and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
Textream is a free macOS teleprompter app. Prior to version 1.5.1, the `DirectorServer` WebSocket server (`ws://127.0.0.1:<httpPort+1>`) 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.
- CVSS
- 7.6 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
- Weakness (CWE)
- CWE-346
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Mar 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
f textream f:textream (from the name) | before 1.5.1 | CNA record |
fka textream fka:textream | before 1.5.1 | NVD |
References
- https://github.com/f/textream/security/advisories/GHSA-wr3v-x247-337wx-refsource-confirm, exploit, mitigation, vendor-advisory
- https://github.com/f/textream/commit/f5ebad82750b9313386c34af8f0ede50c213a8a0x-refsource-misc, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.