Denis: As I noted when closing the issue, the threat is out of scope for
the JWT BCP.

On Mon, Nov 17, 2025 at 3:47 PM Denis <[email protected]> wrote:

> Hello Dick,
>
> Why not saying what you wrote into the document ?
>
> The threat exists (and should not be ignored). While this document
> describes implementation considerations,
> the way to counter this threat is not described in this document.
>
> Selective disclosure deployment of SD-JWTs will be insecure until / unless
> counter-measures will be taken.
> These counter-measures are thus critical.
>
> At the moment, people reading the draft might believe that following all
> these best practices will mean
> a safe and secure implementation. However, this will not be the case.
>
> Denis
>
> PS. I switched to the mailing list as you closed the issue without
> allowing me to respond on github.
>
> *dickhardt* left a comment (oauth-wg/draft-ietf-oauth-rfc8725bis#15)
> <https://github.com/oauth-wg/draft-ietf-oauth-rfc8725bis/issues/15#issuecomment-3542433019>
>
> @Denisthemalice <https://github.com/Denisthemalice>
>
> Thanks for raising this. The scenario you describe is absolutely a
> real-world threat, but it results from key-management and TEE isolation
> failures, not from any behavior specific to JWTs or JOSE.
>
> The JWT BCP focuses narrowly on how to create, validate, and use JWTs
> safely (algorithm verification, claim validation, confusion/substitution
> prevention, cryptographic parameter limits, etc.).
>
> The TEE scenario is an operational/platform issue: multiple applications
> are allowed to use the same signing key. JWTs (or any other token type)
> cannot defend against a compromised or overly-permissive key environment.
>
> Therefore this threat is out of scope for this document, and I am closing
> this issue. It is better covered by platform security guidance,
> key-attestation requirements, or the SD-JWT deployment BCP rather than the
> JWT BCP.
>
> —
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