CVE-2020-35669
http before 0.13.3 vulnerable to header injection
An issue was discovered in the http package through 0.12.2 for Dart. If the attacker controls the HTTP method and the app is using Request directly, it's possible to achieve CRLF injection in an HTTP request.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in the http package through 0.12.2 for Dart. If the attacker controls the HTTP method and the app is using Request directly, it's possible to achieve CRLF injection in an HTTP request.
- Record
CVE-2020-35669- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-74
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the http package through 0.12.2 for Dart. If the attacker controls the HTTP method and the app is using Request directly, it's possible to achieve CRLF injection in an HTTP request.
- Record
CVE-2020-35669- Updated
- 2026-11-02
EUVDEUVD-2022-2440 No score
An issue was discovered in the http package through 0.12.2 for Dart. If the attacker controls the HTTP method and the app is using Request directly, it's possible to achieve CRLF injection in an HTTP request.
- Record
EUVD-2022-2440- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4rgh-jx4f-qfcq
http before 0.13.3 vulnerable to header injection
An issue was discovered in the http package before 0.13.3 for Dart. If the attacker controls the HTTP method and the app is using Request directly, it's possible to achieve CRLF injection in an HTTP request via HTTP header injection. This issue has been addressed in commit abb2bb182 by validating request methods.
- Record
GHSA-4rgh-jx4f-qfcq- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-74
- Updated
- 2026-11-02
OSV
An issue was discovered in the http package through 0.12.2 for Dart. If the attacker controls the HTTP method and the app is using Request directly, it's possible to achieve CRLF injection in an HTTP request.
- Record
CVE-2020-35669- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-4rgh-jx4f-qfcq
http before 0.13.3 vulnerable to header injection
An issue was discovered in the http package before 0.13.3 for Dart. If the attacker controls the HTTP method and the app is using Request directly, it's possible to achieve CRLF injection in an HTTP request via HTTP header injection. This issue has been addressed in commit abb2bb182 by validating request methods.
- Record
GHSA-4rgh-jx4f-qfcq- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-74
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
httpPub |
before 0.13.3 | 0.13.3 |
httpPub |
before 0.13.3, plus listed versions 0.10.00.11.00.11.0+10.11.10.11.1+1 Show 45 moreShow less0.11.1+30.11.20.11.30.11.3+10.11.3+110.11.3+120.11.3+130.11.3+140.11.3+150.11.3+160.11.3+170.11.3+20.11.3+30.11.3+40.11.3+50.11.3+60.11.3+70.11.3+80.11.3+90.12.00.12.0+10.12.0+20.12.0+30.12.0+40.12.10.12.20.13.00.13.0-nullsafety.00.13.10.13.20.2.10+10.2.7+00.2.8+20.2.9+70.3.1+10.3.20.3.40.3.5+10.3.7+60.4.00.4.10.4.20.4.3+10.4.4+40.4.5+1 |
0.13.3 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | n0npax/CVE-2020-35669 | 2020-12-22 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-35669 is a medium vulnerability (CVSS 6.1) in Dart Http, published December 24, 2020. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.15%, the 82nd percentile. Fixed in http 0.13.3.
References
github.com/dart-lang/http/issues/511
nvd.nist.gov/vuln/detail/CVE-2020-35669
pub.dev/packages/http/changelog
Left out here: 63 versions. The JSON record has them.