GHSA-QJXF-F2MG-C6MC Tornado is vulnerable to DoS due to too many multipart parts

In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility of denial-of-service due to the cost of parsing very large multipart...

Tornado is vulnerable to DoS due to too many multipart parts

In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility of denial-of-service due to the cost of parsing very large multipart...

SUSE CVE-2026-31958

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

The vulnerability of the _parseparam function in the httputil.py component of the Python Tornado web framework, which allows a hacker to cause a denial-of-service attack.

The vulnerability of the parseparam function in the httputil.py component of the Python Tornado web framework involves an uncontrolled resource consumption. Exploiting this vulnerability could allow a malicious actor to cause service failures...

Tornado has incomplete validation of cookie attributes

Values passed to the domain, path, and samesite arguments of RequestHandler.setcookie were not completely validated in versions of Tornado prior to 6.5.5. In particular, semicolons would be allowed, which could be used to inject attacker-controlled values for other cookie attributes...

Parameter Injection

Overview tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. Affected versions of this package are vulnerable to Parameter Injection in the setcookie function in web.py‎. An attacker can manipulate cookie attributes by injecting values after ...

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 during the parsing of multipart/form-data bodies containing an excessive...

DEBIAN-CVE-2026-31958

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

CVE-2026-31958

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

PYSEC-2026-140

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

PYSEC-2026-140

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

UBUNTU-CVE-2026-31958

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

CVE-2026-31958

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

CVE-2026-31958

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

CVE-2026-31958

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

CVE-2026-31958 Tornado has a DoS due to too many multipart parts

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

CVE-2026-31958 Tornado has a DoS due to too many multipart parts

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

CVE-2026-31958 Tornado has a DoS due to too many multipart parts

Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the maxbodysize setting default 100MB. Since parsing occurs synchronously on the main thread, this creates the possibility ...

CVE-2026-31958

Tornado (Python) before 6.5.5 is vulnerable in its multipart/form-data parsing: the only limit is max_body_size (default 100MB) and parsing occurs synchronously on the main thread, enabling denial-of-service via very large multipart bodies with many parts. The issue is fixed in 6.5.5. CVSS metric...

PT-2026-24805

Name of the Vulnerable Software and Affected Versions Tornado versions prior to 6.5.5 Description Tornado is a Python web framework and asynchronous networking library. In versions prior to 6.5.5, the only limit on the number of parts in multipart/form-data requests is the max body size setting,...