Out-of-bounds Read Affecting libssh package, versions [0,]
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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Test your applications- Snyk IDSNYK-CONAN-LIBSSH-18305723
- published25 Jul 2026
- disclosed21 Jul 2026
- creditUnknown
Introduced: 21 Jul 2026
NewCVE-2026-59842 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read in the GSSAPIKeyExchange process when a client-supplied Curve25519 public key shorter than the expected length is copied without proper length validation. An attacker can access small portions of server memory by sending a specially crafted short public key during the key exchange process.
Workaround
This vulnerability can be mitigated by disabling GSSAPIKeyExchange or removing gss-curve25519-sha256- from GSSAPIKexAlgorithms if appropriate.