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CVE-2021-39185

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CVE-2021-39185

Published: Sep 1, 2021

Modified: Aug 4, 2024

PUBLISHED

CVSS v3.1

9.1

CRITICAL

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.

VendorProductVersions

http4s

http4s

affected
< 0.21.27
affected
>= 0.22.0, < 0.22.3
affected
>= 0.23.0, < 0.23.2
affected
>= 1.0.0-M1, <= 1.0.0-M24

Weaknesses (CWE)

CWE-346

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

References

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