CVE-2026-44889
Severity CVSS v4.0:
Pending analysis
Type:
CWE-601
URL Redirection to Untrusted Site ('Open Redirect')
Publication date:
22/06/2026
Last modified:
26/06/2026
Description
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.
Impact
Base Score 3.x
6.10
Severity 3.x
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:pylonsproject:webob:*:*:*:*:*:*:*:* | 1.8.10 (excluding) |
To consult the complete list of CPE names with products and versions, see this page