Improper Certificate Validation Affecting wcurl package, versions <8.22.0-150600.4.58.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.41% (36th percentile)

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  • Snyk IDSNYK-SLES156-WCURL-22192374
  • published4 Nov 2026
  • disclosed3 Nov 2026

Introduced: 3 Nov 2026

NewCVE-2026-12064  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 wcurl to version 8.22.0-150600.4.58.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream wcurl package and not the wcurl package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

When a user invokes curl using a schemeless URL combined with --proto-default sftp (or scp), a disconnect occurs between the tool layer and libcurl. The tool layer incorrectly infers the URL scheme, which erroneously bypasses the initialization of critical SSH security options like CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256 and CURLOPT_SSH_KNOWNHOSTS. Conversely, the libcurl runtime successfully honors CURLOPT_DEFAULT_PROTOCOL and establishes the connection via SFTP/SCP as specified. Because the tool layer skipped the security configuration, these SSH host verification options are silently omitted, causing curl to connect to an unverified SSH remote host without throwing an error.

CVSS Base Scores

version 3.1