CVE-2026-82208
With the wolfSSL backend, when CA caching is enabled and an `CURLOPT_SSL_CTX_FUNCTION` callback replaces the trust store, libcurl can silently reinstall the cached store after the callback returns. A certificate trusted by the cached store but rejected by the callback-selected store is then incorrectly accepted.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.41%
- Percentil entre todas las CVEs puntuadas: 33
- Fecha de la puntuación: 5/10/2026
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
T1557Adversary-in-the-Middlecredential access · collection75 % - Impacto secundario
T1041Exfiltration Over C2 Channelexfiltration70 %
AV:N/PR:N/UI:N indica red sin privilegios (T1190). wolfSSL con caché manipulado permite MITM aceptando certificados falsos (T1557) y exfiltración de datos (T1041).
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-295
- CWE-295
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-82208",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-82208",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-09-08T18:46:24.528833Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 3.6,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"affectedData": [
{
"vendor": "curl",
"product": "curl",
"versions": [
{
"status": "affected",
"version": "8.9.1",
"lessThan": "8.14.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "8.15.0",
"lessThan": "8.16.1",
"versionType": "semver"
},
{
"status": "affected",
"version": "8.17.0",
"lessThan": "8.20.1",
"versionType": "semver"
},
{
"status": "affected",
"version": "8.21.0",
"lessThan": "8.22.0",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
},
{
"repo": "https://github.com/curl/curl.git",
"vendor": "curl",
"product": "curl",
"versions": [
{
"status": "affected",
"version": "0f2876b2c33f6784a27b6f7345bd8cd95b46352a",
"lessThan": "ed0338befd1d865a8ea1fbaa90013a096dedd07a",
"versionType": "git"
}
],
"defaultStatus": "unaffected"
},
{
"vendor": "curl",
"product": "curl",
"versions": [
{
"status": "affected",
"version": "8.21.0"
},
{
"status": "affected",
"version": "8.20.0"
},
{
"status": "affected",
"version": "8.19.0"
},
{
"status": "affected",
"version": "8.18.0"
},
{
"status": "affected",
"version": "8.17.0"
},
{
"status": "affected",
"version": "8.16.0"
},
{
"status": "affected",
"version": "8.15.0"
},
{
"status": "affected",
"version": "8.14.1"
},
{
"status": "affected",
"version": "8.14.0"
},
{
"status": "affected",
"version": "8.13.0"
},
{
"status": "affected",
"version": "8.12.1"
},
{
"status": "affected",
"version": "8.12.0"
},
{
"status": "affected",
"version": "8.11.1"
},
{
"status": "affected",
"version": "8.11.0"
},
{
"status": "affected",
"version": "8.10.1"
},
{
"status": "affected",
"version": "8.10.0"
},
{
"status": "affected",
"version": "8.9.1"
}
],
"defaultStatus": "unaffected"
}
]
}
],
"published": "2026-09-06T18:17:22.733",
"references": [
{
"url": "https://curl.se/docs/CVE-2026-82208.html",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "2499f714-1537-4658-8207-48ae4bb9eae9"
},
{
"url": "https://curl.se/docs/CVE-2026-82208.json",
"tags": [
"Vendor Advisory"
],
"source": "2499f714-1537-4658-8207-48ae4bb9eae9"
},
{
"url": "https://hackerone.com/reports/3973090",
"tags": [
"Exploit",
"Mitigation",
"Third Party Advisory"
],
"source": "2499f714-1537-4658-8207-48ae4bb9eae9"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"description": [
{
"lang": "en",
"value": "CWE-295"
}
]
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-295"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "With the wolfSSL backend, when CA caching is enabled and an\n`CURLOPT_SSL_CTX_FUNCTION` callback replaces the trust store, libcurl can\nsilently reinstall the cached store after the callback returns. A certificate\ntrusted by the cached store but rejected by the callback-selected store is\nthen incorrectly accepted."
}
],
"lastModified": "2026-09-15T07:16:31.050",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "AA8D9E44-54D2-45D2-89F6-3EC39E937F40",
"versionEndExcluding": "8.22.0",
"versionStartIncluding": "8.9.1"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9"
}