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High severity7.5NVD Advisory· Published Sep 2, 2026· Updated Sep 4, 2026

CVE-2026-56855

CVE-2026-56855

Description

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.

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Affected products

3793

Patches

Vulnerability mechanics

References

4

News mentions

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