HTTP Status Codes

423 Locked

A WebDAV status indicating the resource is locked, so the method cannot be applied until the lock is released.

What it means

423 Locked (RFC 4918) means the resource — or a parent collection — is locked, typically by another user's WebDAV lock during collaborative editing. The client must wait for or take over the lock before modifying it.

Why it matters

  • It enforces WebDAV locking so concurrent editors do not clobber each other.

Common mistakes

  • Encountering 423 on non-WebDAV APIs where it is not the right concurrency signal (prefer 409/412).

How WebInspect checks this

  • WebInspect reports the status and any lock-related headers where present.