this post was submitted on 16 Jun 2026
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27
PSN Single-Letter Username Glitch: What Actually Broke (thecybersecguru.com)
submitted 4 days ago* (last edited 4 days ago) by UnLocoPoco@lemmy.world to c/technology@lemmy.world
3 comments fedilink hide all child comments
 

PSN briefly allowed users to claim single-letter Online IDs like A, B, X, and Z, even though Sony’s public username rules require 3–16 characters. It looks less like a planned feature and more like a validation failure somewhere in PSN’s identity stack, showing why client-side checks are never enough and why all platforms need consistent server-side validation across APIs, account services, and databases.

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[–] orclev@lemmy.world 12 points 4 days ago (1 children)

and why ~~old~~ all platforms need consistent server-side validation across APIs, account services, and databases

FTFY.

[–] JohnEdwa@sopuli.xyz 11 points 4 days ago (1 children)

I once registered a Subway account without a gender simply by modifying the registration form as the only validation was marking that input field mandatory in the HTML.
You couldn't actually use it as it would crash the app if you did as it couldn't handle the gender of the user being null :)

[–] Illogicalbit@lemmy.world 3 points 4 days ago

Little Bobby Tables?