CVE-2022-3095
CWE-20Published: October 27, 2022· Updated: Jun 17, 2026
Official Description
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.
Risk Analysis
Dart and Flutter SDKs have a discrepancy in backslash parsing within URIs compared to standard web specifications, which can lead to authentication bypass in applications. The critical 9.8 CVSS score indicates that this parsing error can be leveraged for severe security compromises.
No public exploit is known, and it is not in the CISA KEV. The vulnerability is remotely exploitable.
Update Dart to version 2.18 or later and Flutter to version 3.30 or later to ensure proper URI parsing.
Technical Analysis
CVE-2022-3095 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-20)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2022-3095 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts