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Advisory record · GHSA-wg33-5h85-7q5p

Mitmweb API Authentication Bypass Using Proxy Server

CVSS 8.2 HighEPSS 0.0087 · 59th percentile

Published by the GitHub Advisory Database at 6 Feb 2025, 17:07 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
mitmproxyPyPI<11.1.211.1.2
Identifiers
GHSA-wg33-5h85-7q5p · CVE-2025-23217 · PYSEC-2026-1630
Weakness (CWE)
CWE-288 · CWE-441
Tags
Published
6 Feb 2025
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Versions of mitmproxy below 11.1.2 are affected, specifically the mitmweb tool; mitmproxy and mitmdump are not. A client on the same local network can send requests through mitmweb's proxy server to reach its internal API, which is normally reachable only from localhost, and this access may be escalated to remote code execution. Upgrade to mitmproxy 11.1.2 or later.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.2 High 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0087, the 59th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:36 UTC First seen by agentprime
  2. 31 Oct 2026, 14:36 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.