CVE-2026-8932
Estado: ModificadaAlta (7.5)—
libcurl would reuse a previously created connection even when some mTLS config related option had been changed that should have prohibited reuse.
libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, some TLS settings related to client certificates were left out from the configuration match checks, making them match too easily. In particular options related to the private key.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.40%
- Percentil entre todas las CVEs puntuadas: 32
- Fecha de la puntuación: 4/10/2026
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 access85 % - Impacto principal
T1556Modify Authentication Processdefense impairment · persistence · credential access75 % - Impacto secundario
T1090.003Multi-hop Proxycommand and control65 %
AV:N/AC:L/PR:N sin UI permite explotar la app expuesta (T1190). Reutilización de conexión mTLS compromete certificados cliente y permite suplantar identidad (T1556) o actuar como proxy (MITM a través de conexión validada, T1090.003).
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)
CWE
- CWE-305
- NVD-CWE-Other
Referencias
JSON original (NVD)
Mostrar
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"published": "2026-07-03T07:16:25.363",
"references": [
{
"url": "https://curl.se/docs/CVE-2026-8932.html",
"tags": [
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"source": "2499f714-1537-4658-8207-48ae4bb9eae9"
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{
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"source": "2499f714-1537-4658-8207-48ae4bb9eae9"
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"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
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"descriptions": [
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"value": "libcurl would reuse a previously created connection even when some mTLS config\nrelated option had been changed that should have prohibited reuse.\n\nlibcurl keeps previously used connections in a connection pool for subsequent\ntransfers to reuse if one of them matches the setup. However, some TLS\nsettings related to client certificates were left out from the configuration\nmatch checks, making them match too easily. In particular options related to\nthe private key."
}
],
"lastModified": "2026-09-15T07:16:33.407",
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"vulnerable": true,
"matchCriteriaId": "F8926D8E-6609-4EFE-A651-42E8E411E990",
"versionEndExcluding": "8.21.0",
"versionStartIncluding": "7.7"
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"operator": "OR"
}
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}
],
"sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9"
}