Security Flaw in libcurl Affects SSH File Transfers
CVE-2025-15079

5.3MEDIUM

Key Information:

Vendor

Curl

Status
Curl
Vendor
CVE Published:
8 January 2026

What is CVE-2025-15079?

A security vulnerability in libcurl allows for insecure SSH-based file transfers using SCP or SFTP. If users configure a known_hosts file, libcurl may still erroneously accept connections to hosts not included in that file if those hosts are present in the libssh global known_hosts database. This oversight could expose users to potential threats by unintentionally connecting to unverified hosts, thereby compromising the integrity and confidentiality of file transfers.

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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-2025-15079.json
https://curl.se/docs/CVE-2025-15079.html
https://hackerone.com/reports/3477116

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

Harry Sintonen
Daniel Stenberg
JSON
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