CVE-2026-14643— undici vulnerable to cross-user information disclosure via whitespace around equals in Cache-Control directives

undici vulnerable to cross-user information disclosure via whitespace around equals in Cache-Control directives

undici's cache interceptor mishandles optional whitespace placed around the equals sign of a qualified no-cache or private Cache-Control directive. In undici from 7.0.0 up to before 7.29.0 and from 8.0.0 up to before 8.9.0, the parser either drops the directive or stores a field name with literal quote characters, so the cache decision fails to recognize the qualification and the response is stored. In shared-cache mode, this lets a response containing one user's authenticated data be served from cache to a later caller, including an unauthenticated one, when both requests resolve to the same cache key. It affects applications that enable the cache interceptor in shared mode, forward Authorization headers upstream, and receive cacheable responses with qualified directives padded with whitespace around the equals sign. This is the whitespace-around-equals variant that the fix for CVE-2026-9678 did not normalize, and it is fixed in undici 7.29.0 and 8.9.0.

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

解释冲突

undici 处理逻辑错误漏洞

undici undici是undici组织的一个HTTP客户端库。 undici 7.0.0版本至7.29.0之前版本和8.0.0版本至8.9.0之前版本存在安全漏洞，该漏洞源于缓存拦截器错误处理了限定no-cache或private Cache-Control指令等号周围的可选空格，可能导致在共享缓存模式下用户认证数据被后续未授权调用者访问。

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