Parece que hay exploit finalmente de webkit, con ciertos matices.
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Fortunately, after all these years, there is finally a WebKit bug that not only affects the consoles, but is also exploitable. It also affects current firmware versions, meaning it is not patched on the latest systems at the time of writing. The current version while writing this post is 26.04-13.40.00.02-00.00.00.0.1. The sad part is that it is only exploitable up to certain versions: 6.00–11.50 on PS4 and 1.xx–8.60 on PS5.