CVE-2025-4035: Red Hat Enterprise Linux 10

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

A flaw was found in libsoup. When handling cookies, libsoup clients mistakenly allow cookies to be set for public suffix domains if the domain contains at least two components and includes an uppercase character. This bypasses public suffix protections and could allow a malicious website to set cookies for domains it does not own, potentially leading to integrity issues such as session fixation.

Affected products

• Red Hat Red Hat Enterprise Linux 10: before 0:3.6.5-3.el10_0.6 (fixed in 0:3.6.5-3.el10_0.6)
• Red Hat Red Hat Enterprise Linux 6
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 9

Published 2025-04-29. Last modified 2026-06-30.