--- id: CVE-2026-0719 title: >- A flaw was identified in the NTLM authentication handling of the libsoup HTTP library, used by GNOME and other applications for network communication summary: >- 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 du… severity: high cvss: 8.6 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H' cwe: - CWE-121 - CWE-121 published: '2026-01-08' updated: '2026-06-30' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-0719' references: - url: 'https://access.redhat.com/errata/RHSA-2026:1948' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2005' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2006' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2007' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2008' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2049' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2182' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2214' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2215' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2216' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2396' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2402' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2512' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2513' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2514' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2528' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2529' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2628' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:2844' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2026-0719' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2427906' label: secalert@redhat.com - url: 'https://gitlab.gnome.org/GNOME/libsoup/-/issues/477' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:1948' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2005' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2006' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2007' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2008' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2049' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2182' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2214' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2215' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2216' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2396' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2402' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2512' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2513' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2514' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2528' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2529' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2628' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:2844' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/security/cve/CVE-2026-0719' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2427906' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0719.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c tags: - nvd epss: 0.00619 epssPercentile: 0.4833 ingestedAt: '2026-06-30T13:26:50.227Z' --- ## Overview 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. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges.