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GHSA-vgwf-h737-ff37

golang.org/x/crypto: Invoking client can cause server deadlock on unexpected responses

Source: GitHub Advisory Database (reviewed) Critical CVE-2026-39830

Packages

EcosystemPackageAffectedFixed in
Go golang.org/x/crypto < 0.52.0 0.52.0

Details

As written in the advisory (Markdown source, shown as plain text).

A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.

References

External links from the advisory. They lead to third-party sites.