libsoup3: A flaw was found in libsoup
CVE-2025-4035 is fixed in 3 products on 1 platform, first by RHSA-2025:8128, released May 19, 2025. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libsoup3 · RHEL 10 | 3.6.5-3.el10_0.6 | RHSA-2025:8128 | May 19, 2025 |
| libsoup3 · ol 10 | 0:3.6.5-3.el10_0.6 | ELSA-2025-8128 | Jun 26, 2025 |
| libsoup3 · rocky 10 | 0:3.6.5-3.el10_0.6 | RLSA-2025:8128 | Oct 3, 2025 |
| libsoup3-devel · ol 10 | 0:3.6.5-3.el10_0.6 | ELSA-2025-8128 | Jun 26, 2025 |
| libsoup3-doc · almalinux 10 | 3.6.5-3.el10_0.6 | ALSA-2025:8128 | May 26, 2025 |
| libsoup3-doc · ol 10 | 0:3.6.5-3.el10_0.6 | ELSA-2025-8128 | Jun 26, 2025 |
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