When doing TLS related transfers with reused easy or multi handles and altering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally reuse a CA store cached in memory for which the partial chain option was reversed. Contrary to the user's wishes and expectations. This could make libcurl find and accept a trust chain that it otherwise would not.
zetlyn/cve-nvd vulnerability cve CVE-2025-14819 cpe cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* known 2026-01-08
https://nvd.nist.gov/vuln/detail/CVE-2025-14819
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{
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"value": "When doing TLS related transfers with reused easy or multi handles and\naltering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally\nreuse a CA store cached in memory for which the partial chain option was\nreversed. Contrary to the user's wishes and expectations. This could make\nlibcurl find and accept a trust chain that it otherwise would not."
}
],
"id": "CVE-2025-14819",
"lastModified": "2026-09-15T07:16:24.260",
"metrics": {
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{
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"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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},
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{
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},
{
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-08T15:00:02.949618Z",
"version": "2.0.3"
}
}
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"tags": [
"Mitigation",
"Patch",
"Vendor Advisory"
],
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},
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"Patch",
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],
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}
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{
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"value": "CWE-295"
}
],
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"type": "Secondary"
},
{
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}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
} |
Text
When doing TLS related transfers with reused easy or multi handles and
altering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally
reuse a CA store cached in memory for which the partial chain option was
reversed. Contrary to the user's wishes and expectations. This could make
libcurl find and accept a trust chain that it otherwise would not.