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Re: Pre-Denied: Status Code (#3410)

Mark Nottingham <mnot@mnot.net> Fri, 03 April 2026 21:48 UTC

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From: Mark Nottingham <mnot@mnot.net>
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Date: Sat, 04 Apr 2026 08:47:14 +1100
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Subject: Re: Pre-Denied: Status Code (#3410)
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I'll be more specific.

Does anyone see a reason not to use 419?

I'd argue that if we allow a single framework to squat on a code successfully, we're going to be running out of codes very very soon.

Cheers,


> On 4 Apr 2026, at 8:14 am, Mark Nottingham <mnot@mnot.net> wrote:
> 
> <https://github.com/httpwg/http-extensions/issues/3410>
> 
> A specific status code needs to be selected.
> 
> The initial draft suggests one in the 4xx range. That seems to be appropriate given the semantics desired (whether broad or narrow; see #3409).
> 
> If that holds, we should select a code that is unregistered and relatively unused.
> 
> The next unassigned 4xx status code is 419. No use is documented in MDN or wikipedia, but I see a few resources that mention a single PHP framework is squatting on it to indicate that a session token is expired.
> 
> What do people think? 
> 
> Cheers,
> 
> --
> Mark Nottingham   https://www.mnot.net/
> 
> 

--
Mark Nottingham   https://www.mnot.net/

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