Allocation of Resources Without Limits or Throttling Affecting golang.org/x/crypto/ssh package, versions <0.56.0
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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Start learning- Snyk IDSNYK-GOLANG-GOLANGORGXCRYPTOSSH-19512464
- published3 Sept 2026
- disclosed2 Sept 2026
- creditWill Mortensen
Introduced: 2 Sep 2026
NewCVE-2026-78662 Â (opens in a new tab)How to fix?
Upgrade golang.org/x/crypto/ssh to version 0.56.0 or higher.
Overview
golang.org/x/crypto/ssh is a SSH client and server
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the connection multiplexer's channel handling (the mux chanList), reached through Dial, NewClientConn, NewControlClientConn, and NewServerConn, where a channel that is registered but not yet established has its incomingRequests queue flooded without bound. A malicious peer can deadlock the entire SSH connection by flooding channel request packets for a channel before it becomes established. This requires the attacker to participate in an SSH connection with the victim over the library.