CVE-2021-22567 json
Bidirectional Override in Dart SDK
published 2022-01-05 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9706
- cvss
- 4.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
Bidirectional Unicode text can be interpreted and compiled differently than how it appears in editors which can be exploited to get nefarious code passed a code review by appearing benign. An attacker could embed a source that is invisible to a code reviewer that modifies the behavior of a program in unexpected ways.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L |
| NVD | 3.1 | 3.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
Affected products
- Google LLC Dart SDK
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
github.com
/dart-lang/sdk/commit/52519ea8eb4780c468c4c2ed00e7c8046ccfed41
patch, third-party-advisory
-
github.com
/dart-lang/sdk/blob/main/CHANGELOG.md
release-notes, third-party-advisory
Sources
- CVE List CVE-2021-22567
- NVD CVE-2021-22567
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