Stack-based buffer overflow in libsoup - CVE-2026-0719
Published: February 11, 2026
Vulnerability identifier: #VU122663
CSH Severity: Critical
CVSS v4.0: 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/E:U/U:Red
CVE-ID: CVE-2026-0719
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Gnome Development Team
Affected software:
libsoup
libsoup
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the md4sum() function of libsoup’s NTLM authentication module (SoupAuthNTLM) when handling NTLM authentication requests. A remote attacker can send specially crafted input to the application, trigger 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.
How to mitigate CVE-2026-0719
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.