CVE-2026-6324
MEDIUMLibsoup: libsoup: http request smuggling via unsigned to signed conversion error
Title source: cnaDescription
A flaw was found in libsoup. A remote attacker could exploit an unsigned to signed conversion error in the `soup_body_input_stream_read_chunked()` function by sending a malicious HTTP request. This vulnerability occurs when libsoup operates behind a non-libsoup proxy server or as a proxy in front of a non-libsoup backend server. Successful exploitation can allow an attacker to bypass security controls, poison web caches, or gain unauthorized access.
References (4)
Core 4
Core References
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-6324
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2458479
https://bugzilla.redhat.com/show_bug.cgi?id=2458479
Various Sources
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/508
Scores
CVSS v3
4.8
EPSS
0.0033
EPSS Percentile
24.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-444
Status
published
Products (5)
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
Published
May 29, 2026
Tracked Since
May 29, 2026