CVE-2026-28412
Published: 02 March 2026
Summary
CVE-2026-28412 is a medium-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Fka Textream. Its CVSS base score is 6.5 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked at the 19.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Limiting concurrent sessions directly prevents uncontrolled resource consumption by capping the number of active sessions per user or account.
Analysis identifies uncontrolled resource consumption indicative of denial-of-service or abuse attempts.
Contingency plan testing includes resource exhaustion scenarios to verify recovery, making it harder for attackers to sustain exploits that cause uncontrolled consumption.
Updated contingency plans include current procedures to detect, contain, and recover from resource exhaustion, limiting an attacker's ability to sustain impact from uncontrolled consumption.
Alternate site allows resumption of operations if resource exhaustion at the primary site is exploited to cause unavailability.
Alternate telecommunications services enable resumption of essential functions when primary services become unavailable due to uncontrolled resource consumption.
The team can analyze and respond to resource exhaustion incidents, reducing the impact of attacks that exploit uncontrolled consumption weaknesses.
Timely maintenance support and spare parts enable rapid recovery from failures induced by uncontrolled resource consumption, shortening the impact window of denial-of-service attacks.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE enables remote exploitation of unbounded WebSocket connections in the DirectorServer to trigger resource exhaustion and application crash, directly matching T1499.004 (Application or System Exploitation) for Endpoint Denial of Service.
NVD Description
Textream is a free macOS teleprompter app. Prior to version 1.5.1, the `DirectorServer` WebSocket server imposes no limit on concurrent connections. Combined with a broadcast timer that sends state to all connected clients every 100 ms, an attacker can exhaust…
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CPU and memory by flooding the server with connections, causing the Textream application to freeze and crash during a live session. Version 1.5.1 fixes the issue.
Deeper analysisAI
CVE-2026-28412 is a denial-of-service vulnerability in Textream, a free macOS teleprompter application. Prior to version 1.5.1, the DirectorServer WebSocket server within the app imposes no limit on concurrent connections. This issue, classified under CWE-400 (Uncontrolled Resource Consumption), combines with a broadcast timer that sends state updates to all connected clients every 100 milliseconds, enabling resource exhaustion. The vulnerability received a CVSS v3.1 base score of 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H) and was published on 2026-03-02.
A remote attacker can exploit this vulnerability by flooding the DirectorServer with concurrent WebSocket connections, overwhelming CPU and memory usage. This causes the Textream application to freeze and crash, particularly during live sessions. Exploitation requires no privileges but involves low complexity over the network and some user interaction, such as enabling the DirectorServer feature in the app.
Mitigation is available in Textream version 1.5.1, which addresses the unbounded connection issue. The GitHub security advisory (GHSA-qr5p-7x47-qxh9) and the fixing commit (3524fa96f98ba17025b48ce9e19d49d859fc2ec1) provide further details on the patch. Security practitioners should advise users to update to version 1.5.1 or later.
Details
- CWE(s)