TLS Vulnerability in libcurl Affects Data Transmission
CVE-2025-14819

5.3MEDIUM

Key Information:

Vendor

Curl

Status
Curl
Vendor
CVE Published:
8 January 2026

What is CVE-2025-14819?

A vulnerability in libcurl allows unintended acceptance of a trust chain due to improper handling of the CURLSSLOPT_NO_PARTIALCHAIN option during TLS transfers. When users reuse easy or multi handles, this flaw may cause libcurl to rely on a cached CA store in memory that contradicts their specified settings, leading to potential security misconfigurations.

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Affected Version(s)

curl 8.17.0

curl 8.16.0

curl 8.15.0

References

https://curl.se/docs/CVE-2025-14819.json
https://curl.se/docs/CVE-2025-14819.html

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Stanislav Fort (Aisle Research)
Daniel Stenberg
JSON
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