CVE-2026-1761
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.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
- Puntuación base: 8.6
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.07%
- Percentil entre todas las CVEs puntuadas: 64
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access92 % - Impacto principal
T1059Command and Scripting Interpreterexecution85 % - Impacto secundario
T1068Exploitation for Privilege Escalationprivilege escalation75 %
Vector AV:N/PR:N/UI:N indica acceso remoto sin privilegios ni interacción. CWE-121 (stack buffer overflow) en parsing HTTP permite ejecución arbitraria de código (T1059) o escalada de privilegios. Descripción explícita: 'remote attacker', 'arbitrary code execution'.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-121
- CWE-121
Referencias
- https://access.redhat.com/errata/RHSA-2026:1948
- https://access.redhat.com/errata/RHSA-2026:2005
- https://access.redhat.com/errata/RHSA-2026:2006
- https://access.redhat.com/errata/RHSA-2026:2007
- https://access.redhat.com/errata/RHSA-2026:2008
- https://access.redhat.com/errata/RHSA-2026:2049
- https://access.redhat.com/errata/RHSA-2026:2182
- https://access.redhat.com/errata/RHSA-2026:2214
- https://access.redhat.com/errata/RHSA-2026:2215
- https://access.redhat.com/errata/RHSA-2026:2216
- https://access.redhat.com/errata/RHSA-2026:2396
- https://access.redhat.com/errata/RHSA-2026:2402
- https://access.redhat.com/errata/RHSA-2026:2410
- https://access.redhat.com/errata/RHSA-2026:2512
- https://access.redhat.com/errata/RHSA-2026:2513
- https://access.redhat.com/errata/RHSA-2026:2514
- https://access.redhat.com/errata/RHSA-2026:2528
- https://access.redhat.com/errata/RHSA-2026:2529
- https://access.redhat.com/errata/RHSA-2026:2628
- https://access.redhat.com/errata/RHSA-2026:2844
- https://access.redhat.com/security/cve/CVE-2026-1761
- https://bugzilla.redhat.com/show_bug.cgi?id=2435961
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/493
- https://access.redhat.com/errata/RHSA-2026:1948
- https://access.redhat.com/errata/RHSA-2026:2005
- https://access.redhat.com/errata/RHSA-2026:2006
- https://access.redhat.com/errata/RHSA-2026:2007
- https://access.redhat.com/errata/RHSA-2026:2008
- https://access.redhat.com/errata/RHSA-2026:2049
- https://access.redhat.com/errata/RHSA-2026:2182
- https://access.redhat.com/errata/RHSA-2026:2214
- https://access.redhat.com/errata/RHSA-2026:2215
- https://access.redhat.com/errata/RHSA-2026:2216
- https://access.redhat.com/errata/RHSA-2026:2396
- https://access.redhat.com/errata/RHSA-2026:2402
- https://access.redhat.com/errata/RHSA-2026:2410
- https://access.redhat.com/errata/RHSA-2026:2512
- https://access.redhat.com/errata/RHSA-2026:2513
- https://access.redhat.com/errata/RHSA-2026:2514
- https://access.redhat.com/errata/RHSA-2026:2528
- https://access.redhat.com/errata/RHSA-2026:2529
- https://access.redhat.com/errata/RHSA-2026:2628
- https://access.redhat.com/errata/RHSA-2026:2844
- https://access.redhat.com/security/cve/CVE-2026-1761
- https://bugzilla.redhat.com/show_bug.cgi?id=2435961
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1761.json
JSON original (NVD)
Mostrar
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"url": "https://access.redhat.com/errata/RHSA-2026:2513",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:2514",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:2528",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:2529",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:2628",
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{
"url": "https://access.redhat.com/errata/RHSA-2026:2844",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-1761",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2435961",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
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{
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1761.json",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
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],
"vulnStatus": "Deferred",
"weaknesses": [
{
"type": "Secondary",
"source": "secalert@redhat.com",
"description": [
{
"lang": "en",
"value": "CWE-121"
}
]
},
{
"type": "Secondary",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"description": [
{
"lang": "en",
"value": "CWE-121"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "Se encontró una falla en libsoup. Esta vulnerabilidad de desbordamiento de búfer basado en pila ocurre durante el análisis de respuestas HTTP multipart debido a un cálculo de longitud incorrecto. Un atacante remoto puede explotar esto enviando una respuesta HTTP multipart especialmente diseñada, lo que puede llevar a corrupción de memoria. Este problema puede resultar en fallos de aplicación o ejecución de código arbitrario en aplicaciones que procesan respuestas de servidor no confiables, y no requiere autenticación ni interacción del usuario."
}
],
"lastModified": "2026-07-15T02:18:20.417",
"sourceIdentifier": "secalert@redhat.com"
}