What’s Vulnerable › Vulnerabilities

CVE-2025-10966: missing SFTP host verification with wolfSSH

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-11-07 · updated 2026-10-19
• Weakness: CWE-322

Description

curl's code for managing SSH connections when SFTP was done using the wolfSSH powered backend was flawed and missed host verification mechanisms. This prevents curl from detecting MITM attackers and more.

Affected products

• curl: from 7.69.0 before 8.17.0 — fixed in 8.17.0

How to fix

Upgrade to a fixed version: curl 8.17.0. Check the vendor advisory for mitigations.

References

• https://curl.se/docs/CVE-2025-10966.html
• https://curl.se/docs/CVE-2025-10966.json
• https://hackerone.com/reports/3355218
• http://www.openwall.com/lists/oss-security/2025/11/05/2
• https://cert-portal.siemens.com/productcert/html/ssa-253495.html

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