CVE-2021-39185

Default CORS config allows any origin with credentials

State: Published
Severity: 9.1 Critical
Published: Sep 1, 2021
Updated: Aug 4, 2024
Reserved: Aug 16, 2021

Description

Http4s is a minimal, idiomatic Scala interface for HTTP services. In http4s versions 0.21.26 and prior, 0.22.0 through 0.22.2, 0.23.0, 0.23.1, and 1.0.0-M1 through 1.0.0-M24, the default CORS configuration is vulnerable to an origin reflection attack. The middleware is also susceptible to a Null Origin Attack. The problem is fixed in 0.21.27, 0.22.3, 0.23.2, and 1.0.0-M25. The original `CORS` implementation and `CORSConfig` are deprecated. See the GitHub GHSA for more information, including code examples and workarounds.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	GitHub_M

Weaknesses

CWE-346 Origin Validation Error

Affected Products

Product	Versions
http4shttp4s	< 0.21.27Affected >= 0.22.0, < 0.22.3Affected >= 0.23.0, < 0.23.2Affected >= 1.0.0-M1, <= 1.0.0-M24Affected

References

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