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CVE PROGRAM SOURCE RECORD9.1 Critical

CVE-2026-39832

Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent

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Status
Published
Published
Updated
Assigning organization
Go

Description

When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

golang.org/x/crypto golang.org/x/crypto/ssh/agent

Default version status: unaffected

  • 0 to < 0.52.0affected

References