VDB-348408 · CVE-2026-28403 · GHSA-wr3v-x247-337w

textream up to 1.5.0 DirectorServer WebSocket Server origin validation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.1	$0-$5k	0.00

Summaryinfo

A vulnerability was found in textream up to 1.5.0 and classified as critical. Impacted is an unknown function of the component DirectorServer WebSocket Server. The manipulation results in origin validation. This vulnerability was named CVE-2026-28403. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in textream up to 1.5.0. Affected is an unknown code of the component DirectorServer WebSocket Server. The manipulation with an unknown input leads to a origin validation vulnerability. CWE is classifying the issue as CWE-346. The product does not properly verify that the source of data or communication is valid. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-28403 since 02/27/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 1.5.1 eliminates this vulnerability. Applying the patch f5ebad82750b9313386c34af8f0ede50c213a8a0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-9200). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

textream

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.6
NVD Vector: 🔒

CNA Base Score: 7.6
CNA Vector (GitHub_M): 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Origin validation
CWE: CWE-346 / CWE-345
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: textream 1.5.1
Patch: f5ebad82750b9313386c34af8f0ede50c213a8a0

Timelineinfo

02/27/2026 CVE reserved
03/02/2026 +3 days Advisory disclosed
03/02/2026 +0 days VulDB entry created
03/11/2026 +9 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-wr3v-x247-337w
Status: Confirmed

CVE: CVE-2026-28403 (🔒)
GCVE (CVE): GCVE-0-2026-28403
GCVE (VulDB): GCVE-100-348408
EUVD: 🔒

Entryinfo

Created: 03/02/2026 17:23
Updated: 03/11/2026 03:07
Changes: 03/02/2026 17:23 (65), 03/02/2026 20:10 (1), 03/04/2026 08:18 (1), 03/04/2026 16:59 (11), 03/11/2026 03:07 (5)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.