HOMEVULNERABILITIESCVE-2026-28403
HIGH

CVE-2026-28403

CWE-346Published: March 2, 2026· Updated: Mar 4, 2026

8.6
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:2.5th

Official 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.

NVD Source

Technical Analysis

CVE-2026-28403 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 8.6.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Affected Vendors & Products

textream1 product
textream
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/f/textream/commit/f5ebad82750b9313386c34af8f0ede50c213a8a0
ADVISORYhttps://github.com/f/textream/security/advisories/GHSA-wr3v-x247-337w

All References (2)

→
https://github.com/f/textream/commit/f5ebad82750b9313386c34af8f0ede50c213a8a0Patch
→
https://github.com/f/textream/security/advisories/GHSA-wr3v-x247-337wExploit · Vendor Advisory · Mitigation

Quick Facts

CVE IDCVE-2026-28403
CVSS Score8.6 / 10
SeverityHIGH
WeaknessCWE-346
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMar 2, 2026

Related CVEs (CWE-346)

CVE-2026-42901
10.0
CVE-2026-6508
9.8
CVE-2026-2611
9.6
CVE-2026-44985
9.6
CVE-2026-11624
9.4
CVE-2026-54030
9.3

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-28403 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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