CVE & CISA-KEV Catalog

CVE-2025-4035

MEDIUM
4.3
CVSS v3
NVD

Description

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.

CWE-178

How to fix

Remediation Available
libsoup3Red Hat / RHEL
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
libsoup3Rocky
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
libsoup3-debuginfoRocky
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
libsoup3-debuginfoRed Hat / RHEL
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
libsoup3-debugsourceRocky
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
libsoup3-debugsourceRed Hat / RHEL
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
libsoup3-develRed Hat / RHEL
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
libsoup3-develRocky
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
libsoup3-docRocky
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128
libsoup3-docRed Hat / RHEL
Fixed in:0:3.6.5-3.el10_0.6RHSA-2025:8128

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityLow
AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Exploit Intelligence

0.35%probability of exploitation in 30 days
27thpercentile

Low risk: more likely to be exploited than 27% of all known CVEs.

References

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CVE-2025-4035 severity badge

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-30.