CVE-2020-37056 - CVE House
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Status published Medium CVE-2020-37056

Crystal Shard http-protection 0.2.0 - IP Spoofing Bypass

Vulnerability Description

Crystal Shard http-protection 0.2.0 contains an IP spoofing vulnerability that allows attackers to bypass protection middleware by manipulating request headers. Attackers can hardcode consistent IP values across X-Forwarded-For, X-Client-IP, and X-Real-IP headers to circumvent security checks and gain unauthorized access.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Halis Duraki (@0xduraki)

Affected Vendor

Crystal Shard

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Affected Software

http-protection
Vulnerable Versions:
<= 0.2.0

Timeline

Official Publish: January 30th, 2026
Last Modified: February 2nd, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)