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CVE-2026-82287— Rybbit Reflects Any Origin in CORS Responses While Allowing Credentials

Quick assessment

Affected
rybbit-io rybbit
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rybbit 在 2.7.0 之前版本存在 CORS 配置错误漏洞。该漏洞允许攻击者通过在 响应中反射任意请求源，从而绕过源站限制，且此时凭证（credentials）处于启用状态。攻击者可以从任意网站发起携带凭证的跨域请求，以受害者用户的身份读取分析数据、账户信息，并执行经过身份验证的状态变更操作。

CVSS 8.1 · High EPSS 0.28% · P20

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
rybbit-io rybbit < 2.7.0 affected
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I. Basic Information for CVE-2026-82287

Vulnerability Information
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Vulnerability Title
Rybbit Reflects Any Origin in CORS Responses While Allowing Credentials
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过度许可的跨域白名单
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rybbit-io rybbit 0 ~ 2.7.0 -

II. Public POCs for CVE-2026-82287

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-82287

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Patches & Fixes for CVE-2026-82287 (1)

Vendor Advisories for CVE-2026-82287 (1)

Proof of Concept for CVE-2026-82287 (1)

Other References for CVE-2026-82287 (2)

IV. Related Vulnerabilities

Same weakness: CWE-942

V. Comments for CVE-2026-82287

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