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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00021.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Curl Subscribe
Curl Subscribe
Haxx Subscribe
Curl Subscribe

Configuration 1 [-]

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Curl Subscribe
Curl Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
http://www.openwall.com/lists/oss-security/2026/01/07/6 cve-icon
https://curl.se/docs/CVE-2025-15079.html cve-icon cve-icon
https://curl.se/docs/CVE-2025-15079.json cve-icon cve-icon
https://hackerone.com/reports/3477116 cve-icon cve-icon
History

Wed, 21 Jan 2026 00:00:00 +0900

Type Values Removed Values Added
First Time appeared Haxx
Haxx curl
CPEs cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
Vendors & Products Haxx
Haxx curl

Fri, 09 Jan 2026 22:30:00 +0900

Type Values Removed Values Added
First Time appeared Curl
Curl curl
Vendors & Products Curl
Curl curl

Fri, 09 Jan 2026 03:15:00 +0900

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 09 Jan 2026 00:30:00 +0900

Type Values Removed Values Added
Weaknesses CWE-297
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N'}

Thu, 08 Jan 2026 20:30:00 +0900

Type Values Removed Values Added
References

Thu, 08 Jan 2026 19:15:00 +0900

Type Values Removed Values Added
Description 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.
Title libssh global known_hosts override
References

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: curl

Published:

Updated: 2026-01-08T14:46:47.042Z

Reserved: 2025-12-24T22:18:18.481Z

Link: CVE-2025-15079

cve-icon Vulnrichment

Updated: 2026-01-08T11:06:21.628Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-08T10:15:47.100

Modified: 2026-01-20T14:50:24.330

Link: CVE-2025-15079

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-09T22:25:07Z

Weaknesses