# CVE-2026-82287

## Summary

- **CVE ID:** CVE-2026-82287
- **Severity:** HIGH
- **CVSS Score:** 8.6 (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)
- **CWE:** CWE-942
- **Published:** Aug 28, 2026
- **Last Modified:** Aug 31, 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.

## Affected Products

- rybbit-io — rybbit (0)

## References

- [CNA](https://github.com/rybbit-io/rybbit/issues/1038)
- [CNA](https://github.com/rybbit-io/rybbit)
- [CNA](https://github.com/rybbit-io/rybbit/blob/v2.6.0/server/src/index.ts)
- [CNA](https://github.com/rybbit-io/rybbit/commit/6f1039bdd3328a84d6700031bc0ce4714020e2f9)
- [CNA](https://www.vulncheck.com/advisories/rybbit-reflects-any-origin-in-cors-responses-while-allowing-credentials)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.28%
- **EPSS Percentile:** 20.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._