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CVE

CVE-2026-28403

Textream Cross-Site WebSocket Hijacking (CSWSH) vulnerability
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CVE

CVE-2026-28403

Textream Cross-Site WebSocket Hijacking (CSWSH) vulnerability

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.6
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28403.json, https://github.com/f/textream/security/advisories/GHSA-wr3v-x247-337w, https://nvd.nist.gov/vuln/detail/CVE-2026-28403, https://github.com/f/textream/commit/f5ebad82750b9313386c34af8f0ede50c213a8a0

Severity

7.6

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.6
EPSS Probability
0.00028%
EPSS Percentile
0.08202%
Introduced Version
0
Fix Available
3524fa96f98ba17025b48ce9e19d49d859fc2ec1

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