Cross-origin response access via wildcard CORS
Published Jun 12, 2026 · Updated Jun 12, 2026
Permissive CORS in Aqara Developer Platform on 2026-04-20 allows remote attackers to read portal responses through a malicious webpage. The /open-server/* handlers return Access-Control-Allow-Origin: * for null and GitHub Pages origins, while the test portals apply the wildcard to actual GET and POST responses without an origin allowlist. A victim must load an attacker-controlled page whose sandboxed iframe issues a null-origin request; exposed responses include production-linked account-oracle results, and account registration requires chaining with a separate flaw.
Summary
What happened
Permissive CORS in Aqara Developer Platform on 2026-04-20 allows remote attackers to read portal responses through a malicious webpage. The /open-server/* handlers return Access-Control-Allow-Origin: * for null and GitHub Pages origins, while the test portals apply the wildcard to actual GET and POST responses without an origin allowlist. A victim must load an attacker-controlled page whose sandboxed iframe issues a null-origin request; exposed responses include production-linked account-oracle results, and account registration requires chaining with a separate flaw.
The record
- CVE
- CVE-2026-50088
- Published
- Jun 12, 2026
- Updated
- Jun 12, 2026
- Vendor
- Aqara
- Product
- Aqara Developer Platform
- Classifications
- CWE-942, T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 12, 2026CVE publishedPublication date reported by the CVE source.
- Jun 12, 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?
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- Affected versionversion=2026-04-20 <0
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- Aqara Developer Portal null-origin CORS reproductionproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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