CVE-2026-44889— WebOb: Location header normalization during redirect leads to open redirect

WebOb: Location header normalization during redirect leads to open redirect

WebOb provides objects for HTTP requests and responses. Prior to 1.8.10, the normalization of the HTTP Location header during a redirect is vulnerable to an open redirect: WebOb joins the redirect target to the request URI using Python's urljoin, and since Python 3.10 the underlying urlsplit strips ASCII tab, carriage return, and newline characters before parsing, so a redirect target containing such characters can be reinterpreted as a protocol-relative URL whose authority is an attacker-controlled host. This bypasses the CVE-2024-42353 fix that escaped a leading double slash, allowing an attacker who influences the redirect location to send users to an arbitrary external site instead of the intended one. This vulnerability is fixed in 1.8.10.

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

指向未可信站点的URL重定向(开放重定向)

Pylons Project WebOb 输入验证错误漏洞

Pylons Project WebOb是Pylons Project团队的一个WSGI请求和响应对象封装库。 Pylons Project WebOb 1.8.10之前版本存在输入验证错误漏洞，该漏洞源于HTTP Location标头在重定向过程中的规范化问题，可能导致开放重定向，攻击者利用包含特殊字符的重定向目标可发送用户至任意外部站点。

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