CVE-2026-9678— Node.js undici 信息泄露漏洞

undici vulnerable to cross-user information disclosure via shared cache whitespace bypass

Impact: Undici's cache interceptor incorrectly classifies some responses as cacheable when the upstream Cache-Control header uses whitespace-padded qualified private or no-cache field names such as private=" authorization" or no-cache="\tauthorization". The parser preserves the surrounding whitespace, so later comparisons against the literal authorization field name fail and the response is stored. In shared-cache mode, this allows a response containing one user's authenticated data to be served from cache to a subsequent caller, including an unauthenticated caller, when both requests resolve to the same cache key. Affected applications are those that explicitly enable the cache interceptor (interceptors.cache()) in shared mode, forward Authorization headers upstream, and receive cacheable responses with non-canonical qualified private or no-cache directives. Patches: Upgrade to undici v7.28.0 or v8.5.0. Workarounds: If upgrade is not immediately possible, disable shared-cache mode for traffic that includes Authorization headers, avoid caching responses to authenticated requests, or add Vary: Authorization upstream.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

通过缓存导致的信息暴露

Node.js undici 信息泄露漏洞

Node.js undici是Node.js基金会开源的一个HTTP/1.1客户端。 Node.js undici 7.28.0之前版本和8.5.0之前版本存在信息泄露漏洞，该漏洞源于缓存拦截器对Cache-Control标头中带空格的限定字段名处理不当，可能导致共享缓存模式下认证用户数据泄露给后续调用者。

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