CVE-2026-54893— Email-derived URL path injection in the Swoosh Microsoft Graph adapter

Email-derived URL path injection in the Swoosh Microsoft Graph adapter

URL path injection in the Microsoft Graph adapter of Swoosh. Swoosh.Adapters.MsGraph builds its Microsoft Graph API request URL by interpolating the sender's email address into the URL path (/users/{from}/sendMail) without percent-encoding or validation. In applications that derive the from address from untrusted or user-influenced input (for example a relay, a contact form, or a "send as" feature), an attacker can place URL-special characters such as /, ?, or # in the local part of the address to escape the intended path segment and rewrite the path and query string of the request. Because the same authenticated POST is sent with the application's Microsoft Graph bearer token, the attacker can redirect it to other Graph endpoints within the token's scopes and control the request's query string. Applications that always use a fixed, trusted from address are not affected. This issue affects swoosh from 1.12.0 before 1.26.3.

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N

对输出编码和转义不恰当

Swoosh 输出处理不当漏洞

swoosh Swoosh是swoosh组织开源的一个专为Elixir语言设计的邮件库。 Swoosh 1.12.0版本至1.26.3之前版本存在输出处理不当漏洞，该漏洞源于URL路径注入问题，在构建Microsoft Graph API请求URL时未对发件人邮箱地址进行百分号编码或验证，攻击者在地址本地部分放置/、?或#等URL特殊字符，可转义路径段并重写请求路径和查询字符串，从而将请求重定向到令牌范围内的其他Graph端点并控制查询字符串。

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