CVE-2022-3095 json
Incorrect parsing of the backslash characters in Dart library
published 2022-10-27 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-42524
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 67%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Google LLC Dart 2.18.2, 3.3.3
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 18 mo ago
Exploit prediction
1.16% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Google LLC Dart
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/dart-lang/sdk/blob/master/CHANGELOG.md#2182---2022-09-28
release-notes, third-party-advisory
Sources
- CVE List CVE-2022-3095
- NVD CVE-2022-3095
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