Allocation of Resources Without Limits or Throttling

Overview tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in HTTPServerRequest.init in tornado/httputil.py via query strings with a...

GHSA-3HV7-MJH2-FV65 Tornado: Unbounded query-string argument count allows event-loop-stalling DoS

Summary HTTPServerRequest.init in tornado/httputil.py parses the URL query string via parseqsbytes with no field-count limit — while the sibling POST-body parsing path parsebodyarguments received a maxnumfields=1000 cap added earlier in this exact same release v6.5.8, commit 8d6363ed, explicitly ...

Tornado: Unbounded query-string argument count allows event-loop-stalling DoS

Summary HTTPServerRequest.init in tornado/httputil.py parses the URL query string via parseqsbytes with no field-count limit — while the sibling POST-body parsing path parsebodyarguments received a maxnumfields=1000 cap added earlier in this exact same release v6.5.8, commit 8d6363ed, explicitly ...

PT-2026-105476

Summary HTTPServerRequest. init in tornado/httputil.py parses the URL query string via parse qs bytes with no field-count limit — while the sibling POST-body parsing path parse body arguments received a max num fields=1000 cap added earlier in this exact same release v6.5.8, commit 8d6363ed,...