DEBIAN-CVE-2026-103261

Tornado before 6.5.9 fails to limit the number of query string fields in HTTPServerRequest.init, allowing remote attackers to cause event-loop stalling by sending requests with thousands of query parameters. Attackers can send unauthenticated GET requests with unbounded query-string field counts ...

AZL-105372 CVE-2026-103261 affecting package python-tornado 6.3.3-11

Tornado before 6.5.9 fails to limit the number of query string fields in HTTPServerRequest.init, allowing remote attackers to cause event-loop stalling by sending requests with thousands of query parameters. Attackers can send unauthenticated GET requests with unbounded query-string field counts ...

CVE-2026-103261

Tornado before 6.5.9 fails to limit the number of query string fields in HTTPServerRequest.init, allowing remote attackers to cause event-loop stalling by sending requests with thousands of query parameters. Attackers can send unauthenticated GET requests with unbounded query-string field counts ...

CVE-2026-103261

Tornado before 6.5.9 fails to limit the number of query string fields in HTTPServerRequest.init, allowing remote attackers to cause event-loop stalling by sending requests with thousands of query parameters. Attackers can send unauthenticated GET requests with unbounded query-string field counts ...

UBUNTU-CVE-2026-103261

Tornado before 6.5.9 fails to limit the number of query string fields in HTTPServerRequest.init, allowing remote attackers to cause event-loop stalling by sending requests with thousands of query parameters. Attackers can send unauthenticated GET requests with unbounded query-string field counts ...

EUVD-2026-90655

Tornado before 6.5.9 fails to limit the number of query string fields in HTTPServerRequest.init, allowing remote attackers to cause event-loop stalling by sending requests with thousands of query parameters. Attackers can send unauthenticated GET requests with unbounded query-string field counts ...

CVE-2026-103261

The Tornado web framework versions prior to 6.5.9 are vulnerable to a Denial of Service (DoS) condition. The root cause is a lack of limits on the number of query string fields processed within the HTTPServerRequest.__init__ component. A remote, unauthenticated attacker can exploit this by sendin...

CVE-2026-103261: Allocation of Resources Without Limits or Throttling

Tornado before 6.5.9 fails to limit the number of query string fields in HTTPServerRequest.init, allowing remote attackers to cause event-loop stalling by sending requests with thousands of query parameters. Attackers can send unauthenticated GET requests with unbounded query-string field counts ...

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-2026-103794

Name of the Vulnerable Software and Affected Versions Tornado versions prior to 6.5.9 Description The software fails to limit the number of query string fields in the HTTPServerRequest. init function. This allows remote, unauthenticated attackers to send GET requests containing thousands of query...

Python Library Tornado < 6.5.8 DoS (CVE-2026-82397)

The version of the Tornado Python package installed on the remote host is prior to 6.5.8. It is, therefore, affected by a denial of service vulnerability: - Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.8, Tornado parses application/x-www-form-urlencoded...

Linux Distros Unpatched Vulnerability : CVE-2026-82397

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.8, Tornado parses application/x-www-form-urlencoded request bodies with...

UBUNTU-CVE-2026-82397

Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.8, Tornado parses application/x-www-form-urlencoded request bodies with urllib.parse.parseqs in tornado/escape.py without passing maxnumfields. RequestHandler.execute in tornado/web.py parses the body before handl...

CVE-2026-82397 Tornado: Urlencoded body parsing omits max_num_fields, so one request can stall the event loop

Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.8, Tornado parses application/x-www-form-urlencoded request bodies with urllib.parse.parseqs in tornado/escape.py without passing maxnumfields. RequestHandler.execute in tornado/web.py parses the body before handl...