Zelys-Dfkh

cookies is a Node.js library for reading and writing HTTP cookies, used by Koa via ctx.cookies. In versions before 0.9.2 the library validates the cookie name and value against character sets that reject the semicolon separator, but the domain and path options are checked only against a permissive RFC 7230 field-content matcher that allows semicolons, and both are written into the Set-Cookie header unescaped. An application that passes untrusted or request-derived data into the domain or path option can therefore inject additional cookie attributes, overriding SameSite, Secure, HttpOnly, or Domain on the cookies the application issues. This is a Set-Cookie attribute injection issue (CWE-74). The issue is fixed in cookies 0.9.2, which validates domain and path against RFC 6265 character sets. As a workaround, keep domain and path application-set rather than derived from untrusted input.

**Name of the Vulnerable Software and Affected Versions** undici versions prior to 6.28.0 undici versions 7.0.0 through 7.28.9 undici versions 8.0.0 through 8.8.9 **Description** The `setCookie()` function fails to fully sanitize cookie attributes. Specifically, the domain value is not checked for semicolons and entries in the unparsed array are not sanitized. This allows attacker-influenced input to inject additional cookie attributes. For instance, a domain value containing a semicolon can append attributes like `SameSite`, and an unparsed entry can inject attributes such as `HttpOnly` without the caller's intent. Applications passing user-controlled input to these fields, such as reverse-proxy or multi-tenant servers scoping session cookies to tenant-supplied domains, may experience bypassed SameSite CSRF protections or have the `Secure`, `HttpOnly`, and `SameSite` attributes forced, stripped, or overridden. **Recommendations** Update to version 6.28.0 Update to version 7.29.0 Update to version 8.9.0