SB2026110966 - Open redirect in py3-webob

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Main Vulnerability Database SB2026110966

SB2026110966 - Open redirect in py3-webob

Published: November 9, 2026

Security Bulletin ID SB2026110966
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Open redirect (CVE-ID: CVE-2026-44889)

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows an unauthenticated remote attacker to redirect users from a trusted WebOb application to an attacker-controlled website.

The vulnerability exists due to WebOb's Location header normalization failing to account for Python URL parsing stripping ASCII tabs, carriage returns, and newlines between leading slashes in redirect targets. An unauthenticated remote attacker can supply a crafted redirect target that becomes an external hostname reference after parsing and lure a user into following the resulting redirect.


Remediation

Install update from vendor's website.

References