---
id: CVE-2026-82287
title: >-
  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
summary: >-
  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…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-942
published: '2026-08-28'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:43.787'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82287'
references:
  - url: 'https://github.com/rybbit-io/rybbit'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/rybbit-io/rybbit/blob/v2.6.0/server/src/index.ts'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/rybbit-io/rybbit/commit/6f1039bdd3328a84d6700031bc0ce4714020e2f9
    label: disclosure@vulncheck.com
  - url: 'https://github.com/rybbit-io/rybbit/issues/1038'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/rybbit-reflects-any-origin-in-cors-responses-while-allowing-credentials
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00513
epssPercentile: 0.41139
ingestedAt: '2026-09-23T17:28:14.817Z'
vendor: rybbit-io
product: rybbit
affected:
  - rybbit < 2.7.0
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-08-31T16:34:07.570910Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.