Improper Verification of Cryptographic Signature Affecting org.apache.sshd:sshd-core package, versions [2.0.0,2.20.0)[3.0.0-M1,3.0.0-M6)
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-JAVA-ORGAPACHESSHD-21816638
- published29 Oct 2026
- disclosed28 Sept 2026
- creditChris Jarret-Davies
Introduced: 28 Sep 2026
CVE-2026-77185 (opens in a new tab)How to fix?
Upgrade org.apache.sshd:sshd-core to version 2.20.0, 3.0.0-M6 or higher.
Overview
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature in the server-side asynchronous authentication handling of the ServerUserAuthService class. An attacker can authenticate without a valid key by driving public-key or hostbased authentication through the async path, where a logic error applies a delayed async result and skips the signature verification or returns a wrong result. This affects only servers whose implementation explicitly opts into the asynchronous authentication mechanism and uses it with public-key or hostbased authentication.