Improper Authentication 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.
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- published28 Jun 2026
- disclosed25 Jun 2026
- creditUnknown
Introduced: 25 Jun 2026
CVE-2026-55962 (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 Authentication in the TLS 1.3 post-handshake authentication process when the server accepts a Finished message without requiring a client certificate or CertificateVerify. An attacker can gain unauthorized access by completing the handshake without presenting valid client credentials. This is only exploitable if the server is configured with post-handshake authentication support and requests a client certificate after the initial handshake.