--- id: CVE-2026-1761 title: A flaw was found in libsoup summary: >- A flaw was found in libsoup. This stack-based buffer overflow vulnerability occurs during the parsing of multipart HTTP responses due to an incorrect length calculation. A remote attacker can exploit this by sending a specially crafted m… severity: high cvss: 8.6 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L' cwe: - CWE-121 - CWE-121 published: '2026-02-02' updated: '2026-06-30' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-1761' 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-2026:2410' 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-2026-1761' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2435961' label: secalert@redhat.com - url: 'https://gitlab.gnome.org/GNOME/libsoup/-/issues/493' 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-2026:2410' 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-2026-1761' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2435961' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1761.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c tags: - nvd epss: 0.01006 epssPercentile: 0.61006 ingestedAt: '2026-07-03T18:53:52.150Z' --- ## Overview A flaw was found in libsoup. This stack-based buffer overflow vulnerability occurs during the parsing of multipart HTTP responses due to an incorrect length calculation. A remote attacker can exploit this by sending a specially crafted multipart HTTP response, which can lead to memory corruption. This issue may result in application crashes or arbitrary code execution in applications that process untrusted server responses, and it does not require authentication or user interaction. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges.