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Web Telegram can be crashed in Chrome using specially crafted URL #1848

d4rky-pl opened this issue May 10, 2019 · 0 comments


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commented May 10, 2019


This regexp:

shortDescriptionText = shortDescriptionText.substr(0, 150).replace(/(\n|\s)+$/, '') + '...'

will cause Chrome to go to 100% CPU and crash the tab if the text contains a lot of newline characters. This can be used for remote DoS on a user, even accidentally.


Replace (\n|\s) with \s since \s already contains a newline character.

How to reproduce

Send the link to

If they changed their meta tag description by now, any string that starts with any alphanumeric characters and then contains 100+ newline characters and end with another set of alphanumeric characters will trigger the issue.


Tested on Chrome 74.0.3729.131

@d4rky-pl d4rky-pl changed the title DoS issue on Chrome Web Telegram can be crashed in Chrome using specially crafted URL May 10, 2019

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