Incorrect parsing of the backslash characters in Dart library
Published Oct 27, 2022
9.8
CRITICALCVSS 3.1
EPSS 0.97%
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.
Affected products
-
- Version FlutterStatusaffectedConstraints<3.3.3
- Version stableStatusaffectedConstraints<2.18.2
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Google LLC | Dart | n/a |
|
Configuration 1
- < 2.18.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Apr 21, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.97% (0.00971) | 60.61th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.87% (0.00867) | 53.83th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.21% (0.00207) | 41.00th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.19% (0.00193) | 58.21th | v3 (v2023.03.01) |
| Apr 8, 2024 | 0.20% (0.00196) | 56.69th | v3 (v2023.03.01) |
| Nov 29, 2023 | 0.18% (0.00181) | 55.19th | v3 (v2023.03.01) |
| Nov 3, 2023 | 0.26% (0.00256) | 63.31th | v3 (v2023.03.01) |
| Sep 27, 2023 | 0.16% (0.00163) | 52.52th | v3 (v2023.03.01) |
| May 4, 2023 | 0.15% (0.00147) | 49.38th | v3 (v2023.03.01) |
| Apr 19, 2023 | 0.14% (0.00139) | 48.01th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00099) | 39.54th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Oct 28, 2022 | 0.89% (0.00885) | 26.74th | v2 (v2022.01.01) |
References (1)
- https://github.com/dart-lang/sdk/blob/master/CHANGELOG.md#2182---2022-09-28 Release NotesThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/dart-lang/sdk/blob/master/CHANGELOG.md#2182---2022-09-28 | Release NotesThird Party Advisory |
Change history (0)
No recorded changes yet.