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ALPINE-CVE-2026-9547

ALPINE-CVE-2026-9547

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.4 · High · Fix available

Published
Updated

Stack: system

Affected products and versions

  • curl Alpine:v3.23

    Affected ranges
    • ECOSYSTEM: ≥ 7.69.0, < 8.22.0-r0

    Update to 8.22.0-r0

  • curl Alpine:v3.24

    Affected ranges
    • ECOSYSTEM: ≥ 7.69.0, < 8.21.0-r0

    Update to 8.21.0-r0

Original sources

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