Stack-based buffer overflow in libsoup - CVE-2026-1761

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Main Vulnerability Database Vulnerabilities #VU122662

Stack-based buffer overflow in libsoup - CVE-2026-1761

Published: February 11, 2026


Vulnerability identifier: #VU122662
CSH Severity: Critical
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-1761
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the soup_filter_input_stream_read_until() function when parsing multipart/form-data response. A remote attacker can send specially crafted data to the application, trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

libsoup
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 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 Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - 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
libsoup-2_4-1-32bit
libsoup-2_4-1-debuginfo-32bit
libsoup-lang
libsoup-2_4-1
libsoup-2_4-1-debuginfo
libsoup-debugsource
typelib-1_0-Soup-2_4
libsoup-devel
libsoup
libsoup (Red Hat package)
libsoup-doc
libsoup-debuginfo
libsoup-help
libsoup2-devel-64bit
libsoup-2_4-1-64bit
libsoup-2_4-1-64bit-debuginfo
libsoup2-lang
libsoup-2_4-1-32bit-debuginfo
libsoup2-devel-32bit
libsoup2-devel
libsoup2-debugsource
libsoup-devel-64bit
libsoup-3_0-0
libsoup-3_0-0-debuginfo
typelib-1_0-Soup-3_0
libsoup-3_0-0-32bit
libsoup-3_0-0-64bit
libsoup-3_0-0-64bit-debuginfo
libsoup-3_0-0-32bit-debuginfo
libsoup-devel-32bit
libsoup3 (Red Hat package)
libsoup3
libsoup3-devel
libsoup3-doc
spice-client-win-x64
spice-client-win-x86
spice-client-win (Red Hat package)
Juniper Junos Space

How to mitigate CVE-2026-1761

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

libsoup-2_4-1-32bit - addressed in versions 2.62.2-5.29.1, 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-2_4-1-debuginfo-32bit - update to 2.62.2-5.29.1
libsoup-lang - addressed in versions 2.62.2-5.29.1, 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
libsoup-2_4-1 - addressed in versions 2.62.2-5.29.1, 2.68.4-150200.4.24.1, 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-2_4-1-debuginfo - addressed in versions 2.62.2-5.29.1, 2.68.4-150200.4.24.1, 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-debugsource - addressed in versions 2.62.2-5.29.1, 2.68.4-150200.4.24.1, 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
typelib-1_0-Soup-2_4 - addressed in versions 2.62.2-5.29.1, 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-devel - addressed in versions 2.62.2-5.29.1, 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
libsoup-devel - addressed in versions 2.62.2-11, 2.62.3-13.0.1
libsoup - addressed in versions 2.62.2-11, 2.62.3-13.0.1
libsoup (Red Hat package) - addressed in versions 2.62.2-11.el7_9, 2.62.3-1.el8_2.8, 2.62.3-2.el8_4.8, 2.62.3-2.el8_6.8, 2.62.3-3.el8_8.8, 2.62.3-13.el8_10, 2.72.0-8.el9_0.9, 2.72.0-8.el9_2.10, 2.72.0-8.el9_4.9, 2.72.0-10.el9_6.6
libsoup-doc - update to 2.62.3-13.0.1
libsoup-debugsource - addressed in versions 2.71.0-11, 2.74.2-12, 2.74.3-12
libsoup-devel - addressed in versions 2.71.0-11, 2.74.2-12, 2.74.3-12
libsoup-debuginfo - addressed in versions 2.71.0-11, 2.74.2-12, 2.74.3-12
libsoup - addressed in versions 2.71.0-11, 2.74.2-12, 2.74.3-12
libsoup-help - addressed in versions 2.71.0-11, 2.74.2-12, 2.74.3-12
libsoup2-devel-64bit - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-2_4-1-64bit - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-2_4-1-64bit-debuginfo - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup2-lang - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-2_4-1-32bit-debuginfo - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup2-devel-32bit - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup2-devel - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup2-debugsource - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-devel-64bit - addressed in versions 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
libsoup-3_0-0 - addressed in versions 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
libsoup-3_0-0-debuginfo - addressed in versions 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
typelib-1_0-Soup-3_0 - addressed in versions 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
libsoup-3_0-0-32bit - addressed in versions 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
libsoup-3_0-0-64bit - addressed in versions 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
libsoup-3_0-0-64bit-debuginfo - addressed in versions 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
libsoup-3_0-0-32bit-debuginfo - addressed in versions 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
libsoup-devel-32bit - addressed in versions 3.0.4-150400.3.31.1, 3.4.4-150600.3.31.1
libsoup3 (Red Hat package) - addressed in versions 3.6.5-3.el10_0.14, 3.6.5-3.el10_1.9, 3.6.5-3.el10_1.10
libsoup3 - update to 3.6.5-9
libsoup3-devel - update to 3.6.5-9
libsoup3-doc - update to 3.6.5-9
spice-client-win-x64 - update to 8.10-7
spice-client-win-x86 - update to 8.10-7
spice-client-win (Red Hat package) - addressed in versions 8.10-7.el8_2.1, 8.10-7.el8_4.1, 8.10-7.el8_6.1, 8.10-7.el8_8.1, 8.10-7.el8_10
Juniper Junos Space - update to 26.1R1 Patch V1

External References

Related Security Bulletins