Use After Free 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-18305725
- published25 Jul 2026
- disclosed21 Jul 2026
- creditUnknown
Introduced: 21 Jul 2026
NewCVE-2026-59850 (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 Use After Free in the channel data callbacks process when data packets are processed after a channel is closed. An attacker can cause a crash or trigger unintended behavior by sending data packets to a closed channel, resulting in the invocation of callbacks after the associated data has already been freed.
Workaround
This vulnerability can be mitigated by manually verifying the channel is not closed inside your channel data callbacks.