CVE-2026-0719

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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. 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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."}, {"lang": "es", "value": "Se identific\u00f3 una falla en el manejo de la autenticaci\u00f3n NTLM de la biblioteca HTTP libsoup, utilizada por GNOME y otras aplicaciones para la comunicaci\u00f3n de red. Al procesar contrase\u00f1as extremadamente largas, un c\u00e1lculo de tama\u00f1o interno puede desbordarse debido al uso incorrecto de enteros con signo. Esto resulta en una asignaci\u00f3n de memoria incorrecta en la pila, seguida de una copia de memoria insegura. Como resultado, las aplicaciones que utilizan libsoup pueden fallar inesperadamente, creando un riesgo de denegaci\u00f3n de servicio."}], "id": "CVE-2026-0719", "lastModified": "2026-11-04T22:17:42.123", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.7, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": 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{"acknowledgement": "Red Hat would like to thank treeplus for reporting this issue.", "bugzilla": {"description": "libsoup: libsoup: Arbitrary code execution via stack-based buffer overflow in NTLM authentication", "id": "2427906", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427906"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-121", "details": ["A flaw was found in libsoup's NTLM (NT LAN Manager) authentication module. When NTLM authentication is enabled, a local attacker can exploit a stack-based buffer overflow vulnerability in the md4sum() function. This allows the attacker to overwrite adjacent memory, which may result in arbitrary code execution with the privileges of the affected application."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-0719", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "libsoup3", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "libsoup", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-0719\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-0719\nhttps://gitlab.gnome.org/GNOME/libsoup/-/issues/477"], "statement": "This vulnerability is rated Important for Red Hat products. A stack-based buffer overflow in libsoup's NTLM authentication module allows a local attacker to achieve arbitrary code execution. Multiple Red Hat components, such as WebKit, Evolution, GVfs, and gnome-online-accounts, enable NTLM by default, increasing the attack surface for this flaw.", "threat_severity": "Important"}

{"analysis": {"en": {"generated_at": "2026-04-18T07:43:13.594770+00:00", "value": {"mitigation_remediation": ["Install the Red\u202fHat update package released in errata RHSA\u20112026:1948 to replace the vulnerable libsoup library.", "Restart all services and applications that depend on libsoup so the new library is loaded.", "Where possible, disable NTLM authentication or restrict password length enforcement on network services until the patch is in place."], "summary": {"action": "Patch Immediately", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Red\u202fHat Customer Advisory Service lists a broad set of affected operating systems, including Red\u202fHat Enterprise Linux\u00a06,\u00a07 (Extended Lifecycle Support),\u00a08, 8.2, 8.4, 8.6, 8.8, 9, 9.4, and 9.6, as well as Red\u202fHat Enterprise Linux\u00a010 and all of its extended update tracks. Red\u202fHat OpenShift Dev Spaces\u00a03.26 is also impacted. The vulnerability resides in the underlying libsoup library that is bundled with these distributions.", "description_and_impact": "A flaw in libsoup\u2019s NTLM authentication routine triggers a signed\u2011to\u2011unsigned conversion error when handling unusually long passwords. The conversion causes an internal size calculation to overflow, leading to an incorrect stack allocation and unsafe memory copying. As a consequence, applications that employ libsoup can crash, resulting in a denial\u2011of\u2011service condition.", "risk_and_exploitability": "The metric set indicates a CVSS score of 8.6, yet the EPSS suggests exploitation probability is below 1\u202f% and it is not listed in the CISA KEV catalog. The stack overflow can be triggered remotely by delivering a specially crafted NTLM authentication message to any application using libsoup, though exploitation would require the attacker to control the authentication payload. Because the flaw leads only to crashes, the most immediate risk is to service availability rather than to confidentiality or integrity."}}}}, "created": "2026-04-18T07:45:24.983999+00:00", "updated": "2026-04-18T07:45:24.984009+00:00", "vendors": []}