CVE-2020-37056

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/30/2026

Last Modified2/3/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-290

References

https://github.com/rogeriozambon/http-protection(disclosure@vulncheck.com)

https://www.exploit-db.com/exploits/48533(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/crystal-shard-http-protection-ip-spoofing-bypass(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

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