CVE Watch15 sept 2026

CVE-2026-9547

When a libcurl-based application performs transfers via `SCP://` or `SFTP://` and utilizes the `CURLOPT_SSH_KEYFUNCTION` callback, it may si

CVSS

7.4

Alto

EPSS

0.3%

p25

KEV

—

Exploit Today

0-100

Publicado: 3 jul 2026 · Última mod.: 15 sept 2026 · CWE-297

EPSS · 30d

0.3%EPSS · 30 días0.3%

2026-08-172026-09-14

Descripción técnica

When a libcurl-based application performs transfers via `SCP://` or `SFTP://` and utilizes the `CURLOPT_SSH_KEYFUNCTION` callback, it may silently accept an untrusted server. This vulnerability occurs when a server presents a host key type that does not match the specific key type already recorded for that host in the `known_hosts` file. Instead of rejecting the mismatch, the callback mechanism fails to properly enforce the restriction, allowing the connection to succeed without warning and risking a potential man-in-the-middle attack.

Referencias oficiales

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