CVE Watch30 jun 2026

CVE-2025-4476

A denial-of-service vulnerability has been identified in the libsoup HTTP client library. This flaw can be triggered when a libsoup client r

CVSS

4.3

Medio

EPSS

0.4%

p32

KEV

—

Exploit Today

0-100

Publicado: 16 may 2025 · Última mod.: 30 jun 2026 · CWE-476

EPSS · 30d

0.4%EPSS · 30 días0.4%

2026-08-232026-09-21

Descripción técnica

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.

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