Improper Verification of Cryptographic Signature Affecting libcurl-minimal package, versions <0:8.12.1-4.el10_2.3


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.33% (25th percentile)

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  • Snyk IDSNYK-RHEL10-LIBCURLMINIMAL-18862032
  • published17 Aug 2026
  • disclosed3 Jul 2026

Introduced: 3 Jul 2026

CVE-2026-9547  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

Upgrade RHEL:10 libcurl-minimal to version 0:8.12.1-4.el10_2.3 or higher.
This issue was patched in RHSA-2026:55450.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl-minimal package and not the libcurl-minimal package as distributed by RHEL. See How to fix? for RHEL: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