CVE-2020-37056
Critical · 9.8CVSS
9.8
EPSS
0.6%
Published
Jan 30, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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