CVE-2022-3095: Dart Software Development Kit

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

The implementation of backslash parsing in the Dart URI class for versions prior to 2.18 and Flutter versions prior to 3.30 differs from the WhatWG URL standards. Dart uses the RFC 3986 syntax, which creates incompatibilities with the '\' characters in URIs, which can lead to auth bypass in webapps interpreting URIs. We recommend updating Dart or Flutter to mitigate the issue.

Affected products

• Dart Dart Software Development Kit: before 2.18.0 (fixed in 2.18.0)
• Flutter Flutter: before 3.3.3 (fixed in 3.3.3)

Published 2022-10-27. Last modified 2026-06-17.