CVE-2026-115477

### Summary On a Streamable HTTP deployment with `auth.jwtSecret` configured, serving a 2026-07-28-era client that declared `elicitation.form` support, a call to a dispatch-gated tool (`destructive: true`, or a scope with an HITL floor) that was offered an `inputRequired` confirmation could still complete after the human declined, cancelled, or the elicitation response was omitted or malformed, provided the client echoed the validly bound `requestState` on resubmission. The server trusted an authentic, call-bound state as proof of approval; the state is minted before the elicitation leg is asked, so it proves only that the resubmission belongs to the same call. ### Details Reproduced directly: a `destructive: true` tool call, offered `inputRequired`, answered with `{action: "decline"}` on the `elicitation/create` leg, still wrote. Present since the 2026-07-28 round trip shipped in v1.13.0 (THE-583). Only dispatch-gated tools were reachable; the sixteen handler-side conditionally gated tools (`write_note` overwrite, `move_note`, and others) did not read the elicitation state on the modern wire at all, so they neither let a decline nor an approval through. ### Impact A client that echoes state after a decline can execute destructive vault operations (delete, cross-folder move, frontmatter replace, link rewrite) that the human explicitly refused. The precondition is a compliant client behaving incorrectly or a client under an attacker's control; the human's refusal is not enforced by the server. ### Patches Fixed in 1.31.4: the server now also requires the confirm leg's own response (`inputResponse`) to be `{action: "accept", content: {approve: true}}` before trusting the echoed state. A declined, cancelled or not-approved round renders the ordinary `elicit_required` error and is never offered a second round for the same declined confirmation. The same release adds server-initiated in-band confirmation on stdio (legacy era), so stdio agents no longer need to mint `e