7.5highHigh
CVE-2026-56855
Golang Crypto
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.
Exploitation status
- A vendor advisory or patch reference has been published.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 7.5 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness
- CWE-770
- Assigned by
- security@golang.org
Dates
- Published
- 2026-09-02
- Last modified
- 2026-09-04
- Sources
- NVD
Affected products
- Golang Crypto- 0.56.0
As listed in the NVD configuration data. Not a statement about your estate.