CVE-2026-16729— undici vulnerable to cookie attribute injection via unsanitized domain and unparsed setCookie fields

undici vulnerable to cookie attribute injection via unsanitized domain and unparsed setCookie fields

undici's setCookie function does not fully sanitize cookie attributes. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, a domain value is not checked for semicolons and entries in the unparsed array are not sanitized, so attacker-influenced input can inject additional cookie attributes. For example, a domain value containing a semicolon can append attributes such as SameSite, and an unparsed entry can inject attributes such as HttpOnly, without the caller setting them. Applications that pass user-controlled input to these fields, such as multi-tenant or reverse-proxy servers that scope session cookies to a tenant-supplied domain, can have SameSite CSRF protections bypassed, or the Secure, HttpOnly, and SameSite attributes forced, stripped, or overridden. The issue is fixed in undici 6.28.0, 7.29.0, and 8.9.0.

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

输出中的特殊元素转义处理不恰当(注入)

undici 输入验证错误漏洞

undici undici是undici组织的一个HTTP客户端库。 undici 6.28.0之前版本、7.0.0版本至7.29.0之前版本和8.0.0版本至8.9.0之前版本存在输入验证错误漏洞，该漏洞源于setCookie函数未完全清理cookie属性，域值未检查分号且未解析数组条目未清理，攻击者可以注入额外cookie属性，可能导致绕过SameSite CSRF保护，或强制、剥离、覆盖Secure、HttpOnly和SameSite属性。

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