State hijacking via wildcard WebSocket origins
Published Sep 3, 2026 · Updated Sep 3, 2026
Cross-site WebSocket hijacking in Avaiga Taipy 4.1.1 and earlier allows remote attackers to read and modify state via a malicious web page. The GUI server passes cors_allowed_origins="*" to Flask-SocketIO while credentials remain enabled, causing arbitrary origins to receive reflected CORS approval with victim cookies. A victim with an active Taipy browser session must visit an attacker-controlled page, which can access bound state and invoke action callbacks.
Summary
What happened
Cross-site WebSocket hijacking in Avaiga Taipy 4.1.1 and earlier allows remote attackers to read and modify state via a malicious web page. The GUI server passes cors_allowed_origins="*" to Flask-SocketIO while credentials remain enabled, causing arbitrary origins to receive reflected CORS approval with victim cookies. A victim with an active Taipy browser session must visit an attacker-controlled page, which can access bound state and invoke action callbacks.
The record
- CVE
- CVE-2026-85183
- Published
- Sep 3, 2026
- Updated
- Sep 3, 2026
- Vendor
- Avaiga
- Product
- Taipy
- Classifications
- CWE-1385, T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 3, 2026CVE publishedPublication date reported by the CVE source.
- Sep 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=4.1.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Cross-Site WebSocket Hijacking socket.io PoCproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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