CVE-2026-9547 Affecting libcurl-devel package, versions <0:8.12.1-4.el10_2.4


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.33% (24th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ORACLE10-LIBCURLDEVEL-18966660
  • published19 Aug 2026
  • disclosed3 Jul 2026

Introduced: 3 Jul 2026

CVE-2026-9547  (opens in a new tab)

How to fix?

Upgrade Oracle:10 libcurl-devel to version 0:8.12.1-4.el10_2.4 or higher.
This issue was patched in ELSA-2026-55450.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl-devel package and not the libcurl-devel package as distributed by Oracle. See How to fix? for Oracle:10 relevant fixed versions and status.

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 Base Scores

version 3.1