CVE-2026-12064
EUVD-2026-4150203.07.2026, 07:16
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.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| haxx | curl | 7.81.0 ≤ 𝑥 < 8.21.0 |
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
| Vendor | Product | Version | Source |
|---|---|---|---|
| curl | curl | 7.81.0 ≤ 𝑥 < 8.14.2 | CNA |
| curl | curl | 8.15.0 ≤ 𝑥 < 8.16.1 | CNA |
| curl | curl | 8.17.0 ≤ 𝑥 < 8.20.1 | CNA |
| curl | curl | 8.20.0 | CNA |
| curl | curl | 8.19.0 | CNA |
| curl | curl | 8.18.0 | CNA |
| curl | curl | 8.17.0 | CNA |
| curl | curl | 8.16.0 | CNA |
| curl | curl | 8.15.0 | CNA |
| curl | curl | 8.14.1 | CNA |
| curl | curl | 8.14.0 | CNA |
| curl | curl | 8.13.0 | CNA |
| curl | curl | 8.12.1 | CNA |
| curl | curl | 8.12.0 | CNA |
| curl | curl | 8.11.1 | CNA |
| curl | curl | 8.11.0 | CNA |
| curl | curl | 8.10.1 | CNA |
| curl | curl | 8.10.0 | CNA |
| curl | curl | 8.9.1 | CNA |
| curl | curl | 8.9.0 | CNA |
| curl | curl | 8.8.0 | CNA |
| curl | curl | 8.7.1 | CNA |
| curl | curl | 8.7.0 | CNA |
| curl | curl | 8.6.0 | CNA |
| curl | curl | 8.5.0 | CNA |
| curl | curl | 8.4.0 | CNA |
| curl | curl | 8.3.0 | CNA |
| curl | curl | 8.2.1 | CNA |
| curl | curl | 8.2.0 | CNA |
| curl | curl | 8.1.2 | CNA |
| curl | curl | 8.1.1 | CNA |
| curl | curl | 8.1.0 | CNA |
| curl | curl | 8.0.1 | CNA |
| curl | curl | 8.0.0 | CNA |
| curl | curl | 7.88.1 | CNA |
| curl | curl | 7.88.0 | CNA |
| curl | curl | 7.87.0 | CNA |
| curl | curl | 7.86.0 | CNA |
| curl | curl | 7.85.0 | CNA |
| curl | curl | 7.84.0 | CNA |
| curl | curl | 7.83.1 | CNA |
| curl | curl | 7.83.0 | CNA |
| curl | curl | 7.82.0 | CNA |
| curl | curl | 7.81.0 | CNA |
Debian Releases
Ubuntu Releases
openSUSE / SLES Releases
openSUSE Product | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| curl |
| ||||||||||||||||||
| libcurl-devel |
| ||||||||||||||||||
| libcurl4 |
| ||||||||||||||||||
| libcurl4-32bit |
|
Amazon Linux Releases
Amazon Package | |||||
|---|---|---|---|---|---|
| curl |
| ||||
| curl-debuginfo |
| ||||
| curl-debugsource |
| ||||
| curl-minimal |
| ||||
| curl-minimal-debuginfo |
| ||||
| libcurl |
| ||||
| libcurl-debuginfo |
| ||||
| libcurl-devel |
| ||||
| libcurl-minimal |
| ||||
| libcurl-minimal-debuginfo |
|
Common Weakness Enumeration
- CWE-297 - Improper Validation of Certificate with Host MismatchThe software communicates with a host that provides a certificate, but the software does not properly ensure that the certificate is actually associated with that host.
- CWE-295 - Improper Certificate ValidationThe software does not validate, or incorrectly validates, a certificate.