Improper Certificate Validation Affecting wolfSSL/wolfssh package, versions [,5.9.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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-UNMANAGED-WOLFSSLWOLFSSH-17660714
- published28 Jun 2026
- disclosed25 Jun 2026
- creditUnknown
Introduced: 25 Jun 2026
CVE-2026-55960 (opens in a new tab)How to fix?
Upgrade wolfSSL/wolfssh to version 5.9.2 or higher.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation due to the acceptance of an un-negotiated raw public key in place of an X.509 certificate, bypassing certificate chain validation in the ParseCertRelative process. An attacker can impersonate a trusted entity or perform man-in-the-middle attacks by presenting a raw public key without proper negotiation or validation. This is only exploitable if Raw Public Key support (HAVE_RPK) is enabled.