CVE intelligence

CVE-2024-42353

Vulnerability intelligence

Published Aug 14, 2024Sources checked Nov 11, 2026

6.1MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2024-42353 and is rated Medium severity with a CVSS score of 6.1. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Aug 12, 2026

CBL-Mariner Releases

Vendor-listed releases

1.8.8-1

CISA KEVNot listedBased on the latest collected catalog

EPSS0.6%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2024-42353?

WebOb provides objects for HTTP requests and responses.

When WebOb normalizes the HTTP Location header to include the request hostname, it does so by parsing the URL that the user is to be redirected to with Python's urlparse, and joining it to the base URL. `urlparse` however treats a `//` at the start of a string as a URI without a scheme, and then treats the next part as the hostname. `urljoin` will then use that hostname from the second part as the hostname replacing the original one from the request.

This vulnerability is patched in WebOb version 1.8.8.

Source: NVD