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parse_cookie(): Does not ignore empty cookies #1245

srittau opened this issue Jan 24, 2018 · 2 comments


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commented Jan 24, 2018

parse_cookie("foo=bar; ; abc=def")
{'foo': 'bar', '; abc': 'def'}

As you can see, instead of a cookie named abc, there is one named ; abc. I came across this problem when I accidentally added an empty cookie in Chrome by calling document.cookie = "" from Javascript. Chrome then sent a Cookie header similar to the one above, which caused another cookie not to be found anymore.


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commented Jan 24, 2018

Are you using the latest version of Werkzeug? Similar to #1118, although I'm not sure if completely empty keys were addressed. If they weren't a similar fix should be pretty straightforward, if you can submit one.


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commented May 14, 2018

#1301 submitted to address the empty segment issue. Travis CI build failed presumably from a timing issue.

yanigisawa added a commit to yanigisawa/werkzeug that referenced this issue May 15, 2018

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