CVE-2026-82287
Rybbit Reflects Any Origin in CORS Responses While Allowing Credentials
- State
- Published
- Severity
- 8.6 High
- Published
- Aug 28, 2026
- Updated
- Sep 24, 2026
- Reserved
- Aug 28, 2026
Description
Rybbit before 2.7.0 contains a CORS misconfiguration vulnerability that allows attackers to bypass origin restrictions by reflecting any request origin in Access-Control-Allow-Origin responses while credentials are enabled. Attackers can issue credentialed cross-origin requests from any website to read analytics data, account information, and perform authenticated state-changing operations as the victim user.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-942 Permissive Cross-domain Security Policy with Untrusted Domains
Affected Products
| Product | Versions |
|---|---|
rybbitrybbit-io |
|
References
- GitHub Issue #1038issue-tracking
- https://github.com/rybbit-io/rybbitproduct
- Vulnerable code: index.tstechnical-description
- Fix commitpatch
- VulnCheck Advisory: Rybbit Reflects Any Origin in CORS Responses While Allowing Credentialsthird-party-advisory
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