CVE-2026-2708
LOWLibsoup: libsoup: http request smuggling via duplicate content-length headers
Title source: cnaDescription
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.
References (4)
Core 4
Core References
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-2708
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2440743
https://bugzilla.redhat.com/show_bug.cgi?id=2440743
Scores
CVSS v3
3.7
EPSS
0.0032
EPSS Percentile
23.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-444
Status
published
Products (11)
gnome/libsoup
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 6
Red Hat/Red Hat Enterprise Linux 7
Red Hat/Red Hat Enterprise Linux 8
Red Hat/Red Hat Enterprise Linux 9
redhat/enterprise_linux
6.0
redhat/enterprise_linux
7.0
redhat/enterprise_linux
8.0
redhat/enterprise_linux
9.0
... and 1 more
Published
Apr 23, 2026
Tracked Since
Apr 24, 2026