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CVE-2026-90882— Reflected arbitrary origins with credentials, allowing cross-origin reads of authenticated user data

一分钟漏洞结论

影响对象
Eclipse Foundation open-vsx.org
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

The open-vsx.org deployment returned Access-Control-Allow-Origin reflecting the requesting origin together with Access-Control-Allow-Credentials: true on the authenticated /user/ endpoints. A page on any origin could therefore issue credentialed requests to th

CVSS 8.7 · High

影响版本矩阵 1

厂商产品 版本范围状态
Eclipse Foundation open-vsx.org 29/04/2026≤ 07/09/2026 affected
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一、 漏洞 CVE-2026-90882 基础信息

漏洞信息

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Vulnerability Title
Reflected arbitrary origins with credentials, allowing cross-origin reads of authenticated user data
来源: CVE Program / CVE List V5
Vulnerability Description
The open-vsx.org deployment returned Access-Control-Allow-Origin reflecting the requesting origin together with Access-Control-Allow-Credentials: true on the authenticated /user/ endpoints. A page on any origin could therefore issue credentialed requests to the service in a logged-in user's browser and read the responses. This exposed /user (login name, avatar, homepage, tokens URL), /user/tokens, /user/namespaces, /user/extensions, /user/search/{name} and /user/namespace/{name}/members, and — because /user/csrf was readable the same way — allowed the CSRF protection on write endpoints to be defeated. Chaining the two, an attacker page could call /user/token/create and exfiltrate a personal access token carrying publish and delete rights over the victim's namespaces. The headers were emitted by the CDN/edge layer, not by the application: the Open VSX software sets allowCredentials(true) in exactly one place, against a single exact origin derived from ovsx.webui.url, and defines no CORS mapping on /user/ beyond it. No configuration of the software produces origin reflection with credentials.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
过度许可的跨域白名单
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
Eclipse Foundation open-vsx.org 29/04/2026 ~ 07/09/2026 -

二、漏洞 CVE-2026-90882 的公开POC

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三、漏洞 CVE-2026-90882 的情报信息

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CVE-2026-90882 其他参考 (1)

IV. Related Vulnerabilities

Same vendor: Eclipse Foundation
Same weakness: CWE-942

V. Comments for CVE-2026-90882

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