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CVE-2026-28403

Fka Textream vulnerability

7.6 HIGHPublic exploitEPSS 0.18%
  1. Published2 Mar 2026

Description

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityLow
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L

Affected products

Fka Textream< 1.5.1

Remediation

Fixed in
Fka Textream≥ 1.5.1

References

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Frequently asked

Is CVE-2026-28403 being actively exploited?

CVE-2026-28403 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.18%.

How severe is CVE-2026-28403?

CVE-2026-28403 has a CVSS 3.1 base score of 7.6, rated high. EPSS estimates a 0.18% probability of exploitation.

Which products are affected by CVE-2026-28403?

Affected products include Fka Textream.

How do I fix CVE-2026-28403?

Upgrade affected software to a fixed version, for example Fka Textream 1.5.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-28403 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.