CVE-2026-56854
Description
The source-address critical option in the Permissions returned by an authentication callback was only enforced for the PublicKeyCallback and VerifiedPublicKeyCallback paths, extending the fix for CVE-2026-46595. Permissions returned by the PasswordCallback, KeyboardInteractiveCallback, NoClientAuthCallback, and GSSAPIWithMICConfig.AllowLogin callbacks were not validated against the client's remote address, so a source-address restriction set by those callbacks was silently ignored. The check is now applied to the Permissions returned by any authentication callback.
How to fix
- golang.org/x/crypto0.55.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| golang.org/x/cryptoGo | v < 0.55.0 | 0.55.0 |
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