Resource Exhaustion Affecting mitmproxy package, versions <12.2.3-r8


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.35% (26th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-WOLFILATEST-MITMPROXY-19517119
  • published3 Sept 2026
  • disclosed31 Aug 2026

Introduced: 31 Aug 2026

CVE-2026-82397  (opens in a new tab)
CWE-400  (opens in a new tab)
CWE-1284  (opens in a new tab)

How to fix?

Upgrade Wolfi mitmproxy to version 12.2.3-r8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mitmproxy package and not the mitmproxy package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

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.parse_qs in tornado/escape.py without passing max_num_fields. RequestHandler._execute in tornado/web.py parses the body before handler dispatch through HTTPServerRequest._parse_body and parse_body_arguments in tornado/httputil.py, so an unauthenticated request body containing millions of separator-delimited fields can synchronously stall the single-threaded event loop and delay every connection. The body is bounded only by max_buffer_size, which defaults to 104857600 bytes. This issue is fixed in version 6.5.8.

CVSS Base Scores

version 3.1