CVE-2025-15079

low-risk

Published 2026-01-08

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.

Do I need to act?

0.03% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 5.3/10 Medium

NETWORK / HIGH complexity

Affected Products (1)

Curl

Affected Vendors

Haxx

References (4)

Vendor Advisory https://curl.se/docs/CVE-2025-15079.html

Vendor Advisory https://curl.se/docs/CVE-2025-15079.json

Exploit https://hackerone.com/reports/3477116

Mailing List http://www.openwall.com/lists/oss-security/2026/01/07/6

/ 100

low-risk

Severity 17/34 · Moderate

Exploitability 0/34 · Minimal

Exposure 5/34 · Minimal