CVE-2026-2708

EUVD-2026-25306
A request smuggling vulnerability exists in libsoup's HTTP/1 header parsing logic. The soup_message_headers_append_common() function in libsoup/soup-message-headers.c unconditionally appends each header value without validating for duplicate or conflicting Content-Length fields. This allows an attacker to send HTTP requests containing multiple Content-Length headers with differing values.
HTTP Request/Response Smuggling
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
3.7 LOW
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 16%
Affected Products (NVD)
VendorProductVersion
gnomelibsoup
-
redhatenterprise_linux
6.0
redhatenterprise_linux
7.0
redhatenterprise_linux
8.0
redhatenterprise_linux
9.0
redhatenterprise_linux
10.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libsoup2.4
bookworm
no-dsa
bullseye
vulnerable
bullseye (security)
vulnerable
trixie
no-dsa
libsoup3
bookworm
no-dsa
forky
vulnerable
sid
vulnerable
trixie
no-dsa
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
libsoup-2_4-1
suse enterprise desktop 15 SP7
2.74.3-150600.4.27.1
fixed
suse enterprise sap 15 SP4
2.74.2-150400.3.31.1
fixed
suse enterprise sap 15 SP5
2.74.2-150400.3.31.1
fixed
suse enterprise sap 15 SP7
2.74.3-150600.4.27.1
fixed
suse enterprise server 12 SP3
2.62.2-5.34.1
fixed
suse enterprise server 12 SP5
2.62.2-5.34.1
fixed
suse enterprise server 15 SP4
2.74.2-150400.3.31.1
fixed
suse enterprise server 15 SP5
2.74.2-150400.3.31.1
fixed
suse enterprise server 15 SP6
2.74.3-150600.4.27.1
fixed
suse enterprise server 15 SP7
2.74.3-150600.4.27.1
fixed
libsoup-2_4-1-32bit
suse enterprise server 12 SP3
2.62.2-5.34.1
fixed
suse enterprise server 12 SP5
2.62.2-5.34.1
fixed
libsoup-3_0-0
suse enterprise desktop 15 SP7
3.4.4-150600.3.34.1
fixed
suse enterprise sap 15 SP4
3.0.4-150400.3.34.1
fixed
suse enterprise sap 15 SP5
3.0.4-150400.3.34.1
fixed
suse enterprise sap 15 SP7
3.4.4-150600.3.34.1
fixed
suse enterprise server 15 SP4
3.0.4-150400.3.34.1
fixed
suse enterprise server 15 SP5
3.0.4-150400.3.34.1
fixed
suse enterprise server 15 SP6
3.4.4-150600.3.34.1
fixed
suse enterprise server 15 SP7
3.4.4-150600.3.34.1
fixed
libsoup-devel
suse enterprise desktop 15 SP7
3.4.4-150600.3.34.1
fixed
suse enterprise sap 15 SP4
3.0.4-150400.3.34.1
fixed
suse enterprise sap 15 SP5
3.0.4-150400.3.34.1
fixed
suse enterprise sap 15 SP7
3.4.4-150600.3.34.1
fixed
suse enterprise server 12 SP3
2.62.2-5.34.1
fixed
suse enterprise server 12 SP5
2.62.2-5.34.1
fixed
suse enterprise server 15 SP4
3.0.4-150400.3.34.1
fixed
suse enterprise server 15 SP5
3.0.4-150400.3.34.1
fixed
suse enterprise server 15 SP6
3.4.4-150600.3.34.1
fixed
suse enterprise server 15 SP7
3.4.4-150600.3.34.1
fixed
libsoup-lang
suse enterprise desktop 15 SP7
3.4.4-150600.3.34.1
fixed
suse enterprise sap 15 SP4
3.0.4-150400.3.34.1
fixed
suse enterprise sap 15 SP5
3.0.4-150400.3.34.1
fixed
suse enterprise sap 15 SP7
3.4.4-150600.3.34.1
fixed
suse enterprise server 12 SP3
2.62.2-5.34.1
fixed
suse enterprise server 12 SP5
2.62.2-5.34.1
fixed
suse enterprise server 15 SP4
3.0.4-150400.3.34.1
fixed
suse enterprise server 15 SP5
3.0.4-150400.3.34.1
fixed
suse enterprise server 15 SP6
3.4.4-150600.3.34.1
fixed
suse enterprise server 15 SP7
3.4.4-150600.3.34.1
fixed
libsoup2-devel
suse enterprise desktop 15 SP7
2.74.3-150600.4.27.1
fixed
suse enterprise sap 15 SP4
2.74.2-150400.3.31.1
fixed
suse enterprise sap 15 SP5
2.74.2-150400.3.31.1
fixed
suse enterprise sap 15 SP7
2.74.3-150600.4.27.1
fixed
suse enterprise server 15 SP4
2.74.2-150400.3.31.1
fixed
suse enterprise server 15 SP5
2.74.2-150400.3.31.1
fixed
suse enterprise server 15 SP6
2.74.3-150600.4.27.1
fixed
suse enterprise server 15 SP7
2.74.3-150600.4.27.1
fixed
libsoup2-lang
suse enterprise desktop 15 SP7
2.74.3-150600.4.27.1
fixed
suse enterprise sap 15 SP4
2.74.2-150400.3.31.1
fixed
suse enterprise sap 15 SP5
2.74.2-150400.3.31.1
fixed
suse enterprise sap 15 SP7
2.74.3-150600.4.27.1
fixed
suse enterprise server 15 SP4
2.74.2-150400.3.31.1
fixed
suse enterprise server 15 SP5
2.74.2-150400.3.31.1
fixed
suse enterprise server 15 SP6
2.74.3-150600.4.27.1
fixed
suse enterprise server 15 SP7
2.74.3-150600.4.27.1
fixed
typelib-1_0-Soup-2_4
suse enterprise desktop 15 SP7
2.74.3-150600.4.27.1
fixed
suse enterprise sap 15 SP4
2.74.2-150400.3.31.1
fixed
suse enterprise sap 15 SP5
2.74.2-150400.3.31.1
fixed
suse enterprise sap 15 SP7
2.74.3-150600.4.27.1
fixed
suse enterprise server 12 SP3
2.62.2-5.34.1
fixed
suse enterprise server 12 SP5
2.62.2-5.34.1
fixed
suse enterprise server 15 SP4
2.74.2-150400.3.31.1
fixed
suse enterprise server 15 SP5
2.74.2-150400.3.31.1
fixed
suse enterprise server 15 SP6
2.74.3-150600.4.27.1
fixed
suse enterprise server 15 SP7
2.74.3-150600.4.27.1
fixed
typelib-1_0-Soup-3_0
suse enterprise desktop 15 SP7
3.4.4-150600.3.34.1
fixed
suse enterprise sap 15 SP4
3.0.4-150400.3.34.1
fixed
suse enterprise sap 15 SP5
3.0.4-150400.3.34.1
fixed
suse enterprise sap 15 SP7
3.4.4-150600.3.34.1
fixed
suse enterprise server 15 SP4
3.0.4-150400.3.34.1
fixed
suse enterprise server 15 SP5
3.0.4-150400.3.34.1
fixed
suse enterprise server 15 SP6
3.4.4-150600.3.34.1
fixed
suse enterprise server 15 SP7
3.4.4-150600.3.34.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
libsoup3
Amazon Linux 2023
0:3.6.6-58.amzn2023
fixed
libsoup3-debuginfo
Amazon Linux 2023
0:3.6.6-58.amzn2023
fixed
libsoup3-debugsource
Amazon Linux 2023
0:3.6.6-58.amzn2023
fixed
libsoup3-devel
Amazon Linux 2023
0:3.6.6-58.amzn2023
fixed
libsoup3-doc
Amazon Linux 2023
0:3.6.6-58.amzn2023
fixed
Common Weakness Enumeration
References
https://access.redhat.com/security/cve/CVE-2026-2708
https://bugzilla.redhat.com/show_bug.cgi?id=2440743
https://gitlab.gnome.org/GNOME/libsoup/-/issues/500
https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/513