What’s Vulnerable › Vulnerabilities

CVE-2021-31402

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-15 · updated 2026-06-17
• Weakness: CWE-74

Description

The dio package 4.0.0 for Dart allows CRLF injection if the attacker controls the HTTP method string, a different vulnerability than CVE-2020-35669.

Affected products

• Flutterchina Dio: from 4.0.0 before 5.0.0 — fixed in 5.0.0

How to fix

Upgrade to a fixed version: Flutterchina Dio 5.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/flutterchina/dio/issues/1130
• https://github.com/flutterchina/dio/issues/1130

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