> On 26 Jun 2026, at 00:50, Aaron Parecki <[email protected]> 
> wrote:
> 
> Hi all,
> 
> As you probably know, the "OAuth for Browser-Based Apps BCP" document has 
> been stuck in the editor's queue for almost a year waiting on the publication 
> of RFC6265bis. In the meantime, the HTTPbis working group has revised the 
> recommendation in RFC6265bis that we reference, changing the recommendation 
> from prefixing cookies with "__Host-" to "__Host-Http-" in a new document 
> draft-ietf-httpbis-layered-cookies. 

From what I can see, they've not changed it, they've introduced another set of 
prefixes. The __Host- prefix still exists, it just doesn't require the HttpOnly 
flag on cookies that are set. Given that the BCP already says HttpOnly is a 
MUST, I'm not sure what this adds?

Does anyone know why the HTTPBis WG added these new prefixes? The old ones 
address known concrete security gaps, but I don't see an attack that this new 
prefix prevents.

-- Neil
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