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CVE-2025-15079

Good to know:

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Date: January 8, 2026

When doing SSH-based transfers using either SCP or SFTP, and setting the known_hosts file, libcurl could still mistakenly accept connecting to hosts *not present* in the specified file if they were added as recognized in the libssh *global* known_hosts file.

Severity Score

Related Resources (6)

https://curl.se/docs/CVE-2025-15079.html
https://hackerone.com/reports/3477116
http://www.openwall.com/lists/oss-security/2026/01/07/6
https://nvd.nist.gov/vuln/detail/CVE-2025-15079
https://curl.se/docs/CVE-2025-15079.json
https://www.mend.io/vulnerability-database/CVE-2025-15079

Severity Score

Weakness Type (CWE)

Improper Validation of Certificate with Host Mismatch

CWE-297

Top Fix

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Upgrade to version https://github.com/curl/curl.git - curl-8_18_0

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

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