VDB-340117 · CVE-2026-0719 · ID 477

libsoup NTLM md4sum stack-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.9	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in libsoup. This affects the function md4sum of the component NTLM. This manipulation causes stack-based overflow. This vulnerability is tracked as CVE-2026-0719. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability was found in libsoup (affected version unknown). It has been declared as critical. Affected by this vulnerability is the function md4sum of the component NTLM. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A flaw was identified in the NTLM authentication handling of the libsoup HTTP library, used by GNOME and other applications for network communication. When processing extremely long passwords, an internal size calculation can overflow due to improper use of signed integers. This results in incorrect memory allocation on the stack, followed by unsafe memory copying. As a result, applications using libsoup may crash unexpectedly, creating a denial-of-service risk.

The advisory is shared at access.redhat.com. This vulnerability is known as CVE-2026-0719 since 01/08/2026. The exploitation appears to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 282481 (Linux Distros Unpatched Vulnerability : CVE-2026-0719), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (282481), EUVD (EUVD-2026-1573) and CERT Bund (WID-SEC-2026-0305). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

Amazon Linux 2
Red Hat Enterprise Linux
Fedora Linux
SUSE Linux
Oracle Linux
RESF Rocky Linux
IBM App Connect Enterprise

Productinfo

Name

libsoup

CPE 2.3info

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CPE 2.2info

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CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.9

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.6
CNA Vector (redhat): 🔒

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 282481
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-0719

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/08/2026 Advisory disclosed
01/08/2026 +0 days CVE reserved
01/08/2026 +0 days VulDB entry created
02/10/2026 +33 days VulDB entry last update

Sourcesinfo

Advisory: 477
Status: Confirmed

CVE: CVE-2026-0719 (🔒)
GCVE (CVE): GCVE-0-2026-0719
GCVE (VulDB): GCVE-100-340117
EUVD: 🔒
CERT Bund: WID-SEC-2026-0305 - Red Hat Enterprise Linux (libsoup): Mehrere Schwachstellen

Entryinfo

Created: 01/08/2026 16:07
Updated: 02/10/2026 14:53
Changes: 01/08/2026 16:07 (62), 01/09/2026 06:23 (2), 01/09/2026 12:54 (8), 02/05/2026 03:25 (5), 02/05/2026 11:12 (7), 02/06/2026 08:12 (1), 02/10/2026 14:53 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.