[#46356] - [6.0] Prohibited input U+0000005C
- Closed
- 17 Nov 2025
- Medium
- Build: 5.4-dev
- # 46356
Steps to reproduce the issue
When entering the following string into an article and trying to save. An exception is thrown.
"mailto:dummy@dummydomain.com\"
This is seemingly caused by the backslash before the quote.
This can happen if you have markup stored in json:
{"content":"<p>Email: <a href=\\"mailto:dummy@dummydomain.com\\">dummy@dummydomain.com<\\/a><\\/p>"}
Expected result
No error should be thrown.
Actual result
An exception with Prohibited input U+0000005C is thrown.
System information (as much as possible)
Joomla 6.0
Additional comments
In previous Joomla versions (e.g. 5.4.0) this did not happen.
joomla-cms-bot
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QuyTon
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bug
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101 Prohibited input U+0000005C
I'm getting this too, but it wasn't related to an email, I was working in YooTheme when it occured, I wasn't doing anything email related. I'm also not 100% sure how to replicate the issue but it has occured 2-3 times now.
YooTheme stores it's config in JSON files so I assume that could be related perhaps.
Same issue here:
- I only wanted to edit the Title of the Article in the backend
- the Content of the Article is made with YOOtheme builder
- ... and I get a
101 Prohibited input U+0000005Cwhen trying to Save (and the change is not saved. I mention it because sometimes you get an error thrown after saving as such)
This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/46356.
so did you report it to youtheme?
Yep, just did it.
But the issue also seems to be broader than this, as in the case of @janschoenherr above.
richard67
- | Status | New | ⇒ | Closed |
| Closed_Date | 0000-00-00 00:00:00 | ⇒ | 2025-11-17 12:06:56 |
| Closed_By | ⇒ | richard67 |
Confirmed.
Stack trace