CVE-2026-44889

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 v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/Pylons/webob/security/advisories/GHSA-fh3h-vg37-cc95	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:pylonsproject:webob:*:*:*:*:*:*:*:*

History

26 Jun 2026, 20:08

Type	Values Removed	Values Added
CPE		cpe:2.3:a:pylonsproject:webob::::::::
References	~~() https://github.com/Pylons/webob/security/advisories/GHSA-fh3h-vg37-cc95 -~~	() https://github.com/Pylons/webob/security/advisories/GHSA-fh3h-vg37-cc95 - Mitigation, Vendor Advisory
First Time		Pylonsproject Pylonsproject webob

22 Jun 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-22 22:16

Updated : 2026-06-26 20:08

NVD link : CVE-2026-44889

Mitre link : CVE-2026-44889

CVE.ORG link : CVE-2026-44889

JSON object : View

Products Affected

pylonsproject

webob

CWE

CWE-601

URL Redirection to Untrusted Site ('Open Redirect')

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