Inconsistent interpretation of HTTP requests in libsoup - CVE-2025-14523

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Main Vulnerability Database Vulnerabilities #VU119956

Inconsistent interpretation of HTTP requests in libsoup - CVE-2025-14523

Published: December 15, 2025


Vulnerability identifier: #VU119956
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-14523
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests. libsoup accepts duplicate Host: headers and implements a last-value-wins policy when soup_message_headers_get_one[_common] is used to construct the request URI, while many proxies and routers use the first Host: header for routing. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.


Affected software

libsoup
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Basesystem Module
openSUSE Leap
openEuler
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
typelib-1_0-Soup-2_4
libsoup-debugsource
libsoup-devel
libsoup-2_4-1
libsoup-2_4-1-debuginfo
libsoup-lang
libsoup-2_4-1-32bit
libsoup-2_4-1-debuginfo-32bit
libsoup (Red Hat package)
libsoup
libsoup-doc
libsoup-debuginfo
libsoup-help
libsoup2-debugsource
libsoup-2_4-1-64bit
libsoup-2_4-1-64bit-debuginfo
libsoup2-devel-64bit
libsoup-2_4-1-32bit-debuginfo
libsoup2-devel-32bit
libsoup2-lang
libsoup2-devel
libsoup3-debuginfo
libsoup3-help
libsoup3-devel
libsoup3-debugsource
libsoup3
libsoup-3_0-0-64bit-debuginfo
libsoup-3_0-0-64bit
libsoup-devel-64bit
libsoup-3_0-0-32bit
libsoup-devel-32bit
libsoup-3_0-0-32bit-debuginfo
typelib-1_0-Soup-3_0
libsoup-3_0-0
libsoup-3_0-0-debuginfo
libsoup3 (Red Hat package)
libsoup3-doc
spice-client-win-x64
spice-client-win-x86
spice-client-win (Red Hat package)
Total Storage Service Console (TSSC) / TS4500 IMC

How to mitigate CVE-2025-14523

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

typelib-1_0-Soup-2_4 - addressed in versions 2.62.2-5.23.1, 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup-debugsource - addressed in versions 2.62.2-5.23.1, 2.68.4-150200.4.19.1, 3.4.4-150600.3.28.1
libsoup-devel - addressed in versions 2.62.2-5.23.1, 3.4.4-150600.3.28.1
libsoup-2_4-1 - addressed in versions 2.62.2-5.23.1, 2.68.4-150200.4.19.1, 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup-2_4-1-debuginfo - addressed in versions 2.62.2-5.23.1, 2.68.4-150200.4.19.1, 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup-lang - addressed in versions 2.62.2-5.23.1, 3.4.4-150600.3.28.1
libsoup-2_4-1-32bit - addressed in versions 2.62.2-5.23.1, 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup-2_4-1-debuginfo-32bit - update to 2.62.2-5.23.1
libsoup (Red Hat package) - addressed in versions 2.62.2-10.el7_9, 2.62.3-1.el8_2.7, 2.62.3-2.el8_4.7, 2.62.3-2.el8_6.7, 2.62.3-3.el8_8.7, 2.62.3-11.el8_10, 2.72.0-8.el9_0.8, 2.72.0-8.el9_2.8, 2.72.0-8.el9_4.8, 2.72.0-10.el9_6.5, 2.72.0-12.el9_7.3
libsoup - addressed in versions 2.62.2-12, 2.62.3-11.0.1, 2.74.3-21
libsoup-devel - addressed in versions 2.62.2-12, 2.62.3-11.0.1, 2.74.3-21
libsoup-doc - addressed in versions 2.62.3-11.0.1, 2.74.3-21
libsoup-debuginfo - addressed in versions 2.71.0-10, 2.74.2-12, 2.74.3-11, 2.74.3-12
libsoup-debugsource - addressed in versions 2.71.0-10, 2.74.2-12, 2.74.3-11, 2.74.3-12
libsoup-devel - addressed in versions 2.71.0-10, 2.74.2-12, 2.74.3-11, 2.74.3-12
libsoup-help - addressed in versions 2.71.0-10, 2.74.2-12, 2.74.3-11, 2.74.3-12
libsoup - addressed in versions 2.71.0-10, 2.74.2-12, 2.74.3-11, 2.74.3-12
libsoup2-debugsource - addressed in versions 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup-2_4-1-64bit - addressed in versions 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup-2_4-1-64bit-debuginfo - addressed in versions 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup2-devel-64bit - addressed in versions 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup-2_4-1-32bit-debuginfo - addressed in versions 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup2-devel-32bit - addressed in versions 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup2-lang - addressed in versions 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup2-devel - addressed in versions 2.74.2-150400.3.19.1, 2.74.3-150600.4.19.1
libsoup3-debuginfo - addressed in versions 3.4.4-17, 3.4.5-13
libsoup3-help - addressed in versions 3.4.4-17, 3.4.5-13
libsoup3-devel - addressed in versions 3.4.4-17, 3.4.5-13
libsoup3-debugsource - addressed in versions 3.4.4-17, 3.4.5-13
libsoup3 - addressed in versions 3.4.4-17, 3.4.5-13
libsoup-3_0-0-64bit-debuginfo - update to 3.4.4-150600.3.28.1
libsoup-3_0-0-64bit - update to 3.4.4-150600.3.28.1
libsoup-devel-64bit - update to 3.4.4-150600.3.28.1
libsoup-3_0-0-32bit - update to 3.4.4-150600.3.28.1
libsoup-devel-32bit - update to 3.4.4-150600.3.28.1
libsoup-3_0-0-32bit-debuginfo - update to 3.4.4-150600.3.28.1
typelib-1_0-Soup-3_0 - update to 3.4.4-150600.3.28.1
libsoup-3_0-0 - update to 3.4.4-150600.3.28.1
libsoup-3_0-0-debuginfo - update to 3.4.4-150600.3.28.1
libsoup3 (Red Hat package) - addressed in versions 3.6.5-3.el10_0.11, 3.6.5-3.el10_1.8
libsoup3 - update to 3.6.5-7
libsoup3-devel - update to 3.6.5-7
libsoup3-doc - update to 3.6.5-7
spice-client-win-x64 - update to 8.10-6
spice-client-win-x86 - update to 8.10-6
spice-client-win (Red Hat package) - addressed in versions 8.10-6.el8_2.1, 8.10-6.el8_4.1, 8.10-6.el8_6.1, 8.10-6.el8_8.1, 8.10-6.el8_10.1

External References

Related Security Bulletins