Vulnerability Report: GO-2026-6355
- CVE-2026-56855
- Affects: golang.org/x/crypto
- Published: Sep 02, 2026
Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a protocol error and tear the connection down instead of buffering and blocking.
Affected Packages
-
PathVersionsSymbols
-
before v0.56.0
Aliases
References
- https://go.dev/issue/81317
- https://go.dev/cl/826524
- https://groups.google.com/g/golang-announce/c/1y3fb2np35U
- https://vuln.go.dev/ID/GO-2026-6355.json
Credits
- Will Mortensen
Feedback
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