How severe is CVE-2020-35669?

CVE-2020-35669 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-35669 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35669?

CVE-2020-35669 affects Dart Http. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35669?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-35669 published?

CVE-2020-35669 was published on 2020-12-24 and last updated on 2026-06-17.

CVE-2020-35669

CVE-2020-35669 is a medium-severity vulnerability in Dart Http with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Dart Http
Published: 2020-12-24
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2020-35669?: 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.
How severe is CVE-2020-35669?: CVE-2020-35669 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-35669 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35669?: CVE-2020-35669 affects Dart Http. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35669?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-35669 published?: CVE-2020-35669 was published on 2020-12-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dart:http:*:*:*:*:*:dart:*:*

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