CVE-2025-4476 – Apache Libsoup Denial of Service

CVE ID : CVE-2025-4476

Published : May 16, 2025, 6:16 p.m. | 44 minutes ago

Description : A denial-of-service vulnerability has been identified in the libsoup HTTP client library. This flaw can be triggered when a libsoup client receives a 401 (Unauthorized) HTTP response containing a specifically crafted domain parameter within the WWW-Authenticate header. Processing this malformed header can lead to a crash of the client application using libsoup. An attacker could exploit this by setting up a malicious HTTP server. If a user’s application using the vulnerable libsoup library connects to this malicious server, it could result in a denial-of-service. Successful exploitation requires tricking a user’s client application into connecting to the attacker’s malicious server.

Severity: 4.3 | MEDIUM

Visit the link for more details, such as CVSS details, affected products, timeline, and more…